Bump spring-boot-autoconfigure

Bumps [spring-boot-autoconfigure](https://github.com/spring-projects/spring-boot) from 2.6.7 to 2.6.15.
- [Release notes](https://github.com/spring-projects/spring-boot/releases)
- [Commits](spring-projects/spring-boot@v2.6.7...v2.6.15)

---
updated-dependencies:
- dependency-name: org.springframework.boot:spring-boot-autoconfigure
  dependency-type: direct:production
...

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

client/Java/examples/client/junoReferenceApp/junoreferenceAppService/pom.xml

@@ -136,7 +136,7 @@ limitations under the License.
     <dependency>
       <groupId>org.springframework.boot</groupId>
       <artifactId>spring-boot-autoconfigure</artifactId>
-      <version>2.6.7</version>
+      <version>2.6.15</version>
     </dependency>
     <dependency>
       <groupId>org.springframework.boot</groupId>