Bump spring-boot-autoconfigure in /Jdempotent-core

Bumps [spring-boot-autoconfigure](https://github.com/spring-projects/spring-boot) from 2.3.4.RELEASE to 2.5.15.
- [Release notes](https://github.com/spring-projects/spring-boot/releases)
- [Commits](spring-projects/spring-boot@v2.3.4.RELEASE...v2.5.15)

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

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

Jdempotent-core/pom.xml

@@ -44,7 +44,7 @@
 
     <properties>
         <java.version>11</java.version>
-        <spring.boot.version>2.3.4.RELEASE</spring.boot.version>
+        <spring.boot.version>2.5.15</spring.boot.version>
         <spring.framework.version>5.2.9.RELEASE</spring.framework.version>
         <version.mockito>1.10.19</version.mockito>
         <version.junit>4.13.1</version.junit>