Bump org.springframework:spring-core in /log4j-parent

Bumps [org.springframework:spring-core](https://github.com/spring-projects/spring-framework) from 5.3.39 to 6.1.14.
- [Release notes](https://github.com/spring-projects/spring-framework/releases)
- [Commits](spring-projects/spring-framework@v5.3.39...v6.1.14)

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

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

Author: dependabot[bot]

log4j-parent/pom.xml

@@ -128,7 +128,7 @@
     <pax-exam.version>4.13.5</pax-exam.version>
     <plexus-utils.version>3.5.1</plexus-utils.version>
     <spring-boot.version>2.7.18</spring-boot.version>
-    <spring-framework.version>5.3.39</spring-framework.version>
+    <spring-framework.version>6.1.14</spring-framework.version>
     <system-stubs.version>2.0.3</system-stubs.version>
     <velocity.version>1.7</velocity.version>
     <wiremock.version>2.35.2</wiremock.version>