chore(deps): bump spring-boot-dependencies from 2.5.5 to 2.5.6 (#313)

Bumps [spring-boot-dependencies](https://github.com/spring-projects/spring-boot) from 2.5.5 to 2.5.6.
- [Release notes](https://github.com/spring-projects/spring-boot/releases)
- [Commits](spring-projects/spring-boot@v2.5.5...v2.5.6)

---
updated-dependencies:
- dependency-name: org.springframework.boot:spring-boot-dependencies
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

pom.xml

@@ -22,7 +22,7 @@
         <version.zeebe.spring>1.2.2</version.zeebe.spring>
         <hazelcast.exporter.version>1.0.1</hazelcast.exporter.version>
 
-        <spring.boot.version>2.5.5</spring.boot.version>
+        <spring.boot.version>2.5.6</spring.boot.version>
         <!-- pin Hazelcast version because of spring-boot-dependencies -->
         <version.hazelcast>5.0</version.hazelcast>