deps: update dependency org.springframework.boot:spring-boot-starter-…

…thymeleaf to v2.6.3 (#689)

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This PR contains the following updates:

| Package | Change | Age | Adoption | Passing | Confidence |
|---|---|---|---|---|---|
| [org.springframework.boot:spring-boot-starter-thymeleaf](https://spring.io/projects/spring-boot) ([source](https://togithub.com/spring-projects/spring-boot)) | `2.6.2` -> `2.6.3` | [![age](https://badges.renovateapi.com/packages/maven/org.springframework.boot:spring-boot-starter-thymeleaf/2.6.3/age-slim)](https://docs.renovatebot.com/merge-confidence/) | [![adoption](https://badges.renovateapi.com/packages/maven/org.springframework.boot:spring-boot-starter-thymeleaf/2.6.3/adoption-slim)](https://docs.renovatebot.com/merge-confidence/) | [![passing](https://badges.renovateapi.com/packages/maven/org.springframework.boot:spring-boot-starter-thymeleaf/2.6.3/compatibility-slim/2.6.2)](https://docs.renovatebot.com/merge-confidence/) | [![confidence](https://badges.renovateapi.com/packages/maven/org.springframework.boot:spring-boot-starter-thymeleaf/2.6.3/confidence-slim/2.6.2)](https://docs.renovatebot.com/merge-confidence/) |

---

### Release Notes

<details>
<summary>spring-projects/spring-boot</summary>

### [`v2.6.3`](https://togithub.com/spring-projects/spring-boot/releases/v2.6.3)

[Compare Source](https://togithub.com/spring-projects/spring-boot/compare/v2.6.2...v2.6.3)

#### 🐞 Bug Fixes

-   'spring.config.import' placeholders can resolve from profile-specific documents when they should fail [#&#8203;29459](https://togithub.com/spring-projects/spring-boot/issues/29459)
-   Warning from AprLifecycleListener when using Tomcat Native and Tomcat 9.0.55 or later [#&#8203;29454](https://togithub.com/spring-projects/spring-boot/issues/29454)
-   ConfigurationPropertySources.attach will always reattach when called multiple times [#&#8203;29410](https://togithub.com/spring-projects/spring-boot/issues/29410)
-   `@SpringBootTest` does not use spring.main.web-application-type properties declared in test resource files [#&#8203;29374](https://togithub.com/spring-projects/spring-boot/issues/29374)
-   Embedded launch script fails if jar is owned by an unknown user [#&#8203;29371](https://togithub.com/spring-projects/spring-boot/issues/29371)
-   ResponseStatusException no longer returning response body in 2.6.2 using Spring Security when application has a custom context path [#&#8203;29299](https://togithub.com/spring-projects/spring-boot/issues/29299)
-   Maven repackaging of a jar with a deeply nested package is prohibitively slow [#&#8203;29268](https://togithub.com/spring-projects/spring-boot/issues/29268)
-   Health contributor exclusion rules aren't applied to child contributors [#&#8203;29251](https://togithub.com/spring-projects/spring-boot/issues/29251)
-   Default value for management.info.env.enabled is outdated [#&#8203;29187](https://togithub.com/spring-projects/spring-boot/pull/29187)

#### 📔 Documentation

-   Refer to Maven Resolver rather than Aether [#&#8203;29480](https://togithub.com/spring-projects/spring-boot/issues/29480)
-   Clarify documentation for RestTemplate customization [#&#8203;29401](https://togithub.com/spring-projects/spring-boot/issues/29401)
-   Learning About Spring Boot Features has "logging" link twice [#&#8203;29380](https://togithub.com/spring-projects/spring-boot/pull/29380)

#### 🔨 Dependency Upgrades

-   Update to Spring Kafka 2.8.2 [#&#8203;29319](https://togithub.com/spring-projects/spring-boot/issues/29319)
-   Upgrade to Hibernate 5.6.4.Final [#&#8203;29497](https://togithub.com/spring-projects/spring-boot/issues/29497)
-   Upgrade to HttpCore5 5.1.3 [#&#8203;29343](https://togithub.com/spring-projects/spring-boot/issues/29343)
-   Upgrade to Infinispan 12.1.11.Final [#&#8203;29344](https://togithub.com/spring-projects/spring-boot/issues/29344)
-   Upgrade to Jaybird 4.0.5.java8 [#&#8203;29345](https://togithub.com/spring-projects/spring-boot/issues/29345)
-   Upgrade to JBoss Logging 3.4.3.Final [#&#8203;29346](https://togithub.com/spring-projects/spring-boot/issues/29346)
-   Upgrade to Lettuce 6.1.6.RELEASE [#&#8203;29347](https://togithub.com/spring-projects/spring-boot/issues/29347)
-   Upgrade to Log4j2 2.17.1 [#&#8203;29184](https://togithub.com/spring-projects/spring-boot/issues/29184)
-   Upgrade to Logback 1.2.10 [#&#8203;29348](https://togithub.com/spring-projects/spring-boot/issues/29348)
-   Upgrade to MariaDB 2.7.5 [#&#8203;29498](https://togithub.com/spring-projects/spring-boot/issues/29498)
-   Upgrade to Maven Jar Plugin 3.2.2 [#&#8203;29349](https://togithub.com/spring-projects/spring-boot/issues/29349)
-   Upgrade to Micrometer 1.8.2 [#&#8203;29316](https://togithub.com/spring-projects/spring-boot/issues/29316)
-   Upgrade to MongoDB 4.4.1 [#&#8203;29350](https://togithub.com/spring-projects/spring-boot/issues/29350)
-   Upgrade to MySQL 8.0.28 [#&#8203;29467](https://togithub.com/spring-projects/spring-boot/issues/29467)
-   Upgrade to Neo4j Java Driver 4.4.2 [#&#8203;29398](https://togithub.com/spring-projects/spring-boot/issues/29398)
-   Upgrade to Netty 4.1.73.Final [#&#8203;29351](https://togithub.com/spring-projects/spring-boot/issues/29351)
-   Upgrade to Netty tcNative 2.0.47.Final [#&#8203;29395](https://togithub.com/spring-projects/spring-boot/issues/29395)
-   Upgrade to Pooled JMS 1.2.3 [#&#8203;29468](https://togithub.com/spring-projects/spring-boot/issues/29468)
-   Upgrade to R2DBC Bom Arabba-SR12 [#&#8203;29396](https://togithub.com/spring-projects/spring-boot/issues/29396)
-   Upgrade to Reactor 2020.0.15 [#&#8203;29315](https://togithub.com/spring-projects/spring-boot/issues/29315)
-   Upgrade to SLF4J 1.7.33 [#&#8203;29397](https://togithub.com/spring-projects/spring-boot/issues/29397)
-   Upgrade to Spring AMQP 2.4.2 [#&#8203;29318](https://togithub.com/spring-projects/spring-boot/issues/29318)
-   Upgrade to Spring Data 2021.1.1 [#&#8203;29317](https://togithub.com/spring-projects/spring-boot/issues/29317)
-   Upgrade to Spring Framework 5.3.15 [#&#8203;29327](https://togithub.com/spring-projects/spring-boot/issues/29327)
-   Upgrade to Spring HATEOAS 1.4.1 [#&#8203;29283](https://togithub.com/spring-projects/spring-boot/issues/29283)
-   Upgrade to Spring Integration 5.5.8 [#&#8203;29320](https://togithub.com/spring-projects/spring-boot/issues/29320)
-   Upgrade to Spring REST Docs 2.0.6.RELEASE [#&#8203;29322](https://togithub.com/spring-projects/spring-boot/issues/29322)

#### ❤️ Contributors

We'd like to thank all the contributors who worked on this release!

-   [@&#8203;izeye](https://togithub.com/izeye)
-   [@&#8203;dreis2211](https://togithub.com/dreis2211)
-   [@&#8203;Omkar-Shetkar](https://togithub.com/Omkar-Shetkar)
-   [@&#8203;jprinet](https://togithub.com/jprinet)

</details>

---

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samples/snippets/cloud-client/src/pom.xml

@@ -111,7 +111,7 @@
     <dependency>
       <groupId>org.springframework.boot</groupId>
       <artifactId>spring-boot-starter-thymeleaf</artifactId>
-      <version>2.6.2</version>
+      <version>2.6.3</version>
     </dependency>
     <dependency>
       <groupId>com.google.api</groupId>