build(deps): bump spring-boot.version from 2.7.2 to 2.7.3

Bumps `spring-boot.version` from 2.7.2 to 2.7.3.

Updates `spring-boot-starter-parent` from 2.7.2 to 2.7.3
- [Release notes](https://github.com/spring-projects/spring-boot/releases)
- [Commits](spring-projects/spring-boot@v2.7.2...v2.7.3)

Updates `spring-boot-starter-data-r2dbc` from 2.7.2 to 2.7.3
- [Release notes](https://github.com/spring-projects/spring-boot/releases)
- [Commits](spring-projects/spring-boot@v2.7.2...v2.7.3)

Updates `spring-boot-starter-actuator` from 2.7.2 to 2.7.3
- [Release notes](https://github.com/spring-projects/spring-boot/releases)
- [Commits](spring-projects/spring-boot@v2.7.2...v2.7.3)

Updates `spring-boot-maven-plugin` from 2.7.2 to 2.7.3
- [Release notes](https://github.com/spring-projects/spring-boot/releases)
- [Commits](spring-projects/spring-boot@v2.7.2...v2.7.3)

---
updated-dependencies:
- dependency-name: org.springframework.boot:spring-boot-starter-parent
  dependency-type: direct:production
  update-type: version-update:semver-patch
- dependency-name: org.springframework.boot:spring-boot-starter-data-r2dbc
  dependency-type: direct:production
  update-type: version-update:semver-patch
- dependency-name: org.springframework.boot:spring-boot-starter-actuator
  dependency-type: direct:production
  update-type: version-update:semver-patch
- dependency-name: org.springframework.boot:spring-boot-maven-plugin
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <support@github.com>

pom.xml

@@ -29,7 +29,7 @@
         <kotlin-logging-jvm.version>2.1.23</kotlin-logging-jvm.version>
         <kotlinx-coroutines-core.version>1.6.3-native-mt</kotlinx-coroutines-core.version>
         <kotlinx-coroutines-reactor.version>1.6.3-native-mt</kotlinx-coroutines-reactor.version>
-        <spring-boot.version>2.7.2</spring-boot.version>
+        <spring-boot.version>2.7.3</spring-boot.version>
         <mockk.version>1.12.5</mockk.version>
         <kotest.version>5.4.2</kotest.version>
         <springmockk.version>3.1.1</springmockk.version>