Bump org.springframework:spring-core from 5.3.31 to 6.0.15

Bumps [org.springframework:spring-core](https://github.com/spring-projects/spring-framework) from 5.3.31 to 6.0.15.
- [Release notes](https://github.com/spring-projects/spring-framework/releases)
- [Commits](spring-projects/spring-framework@v5.3.31...v6.0.15)

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

Signed-off-by: dependabot[bot] <[email protected]>

pom.xml

@@ -51,7 +51,7 @@
         </contributor>
     </contributors>
     <properties>
-        <org.springframework.version>5.3.31</org.springframework.version>
+        <org.springframework.version>6.0.15</org.springframework.version>
         <jackson.version>2.15.2</jackson.version>
         <joda.time.version>2.12.5</joda.time.version>
         <slf4j.version>1.7.36</slf4j.version>