Bump junit5.version from 5.11.0 to 5.12.0 in /lang/java (#3320)

Bumps `junit5.version` from 5.11.0 to 5.12.0.

Updates `org.junit.vintage:junit-vintage-engine` from 5.11.0 to 5.12.0
- [Release notes](https://github.com/junit-team/junit5/releases)
- [Commits](junit-team/junit5@r5.11.0...r5.12.0)

Updates `org.junit.jupiter:junit-jupiter` from 5.11.0 to 5.12.0
- [Release notes](https://github.com/junit-team/junit5/releases)
- [Commits](junit-team/junit5@r5.11.0...r5.12.0)

---
updated-dependencies:
- dependency-name: org.junit.vintage:junit-vintage-engine
  dependency-type: direct:development
  update-type: version-update:semver-minor
- dependency-name: org.junit.jupiter:junit-jupiter
  dependency-type: direct:development
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

lang/java/pom.xml

@@ -48,7 +48,7 @@
     <jackson-bom.version>2.18.2</jackson-bom.version>
     <jetty.version>9.4.57.v20241219</jetty.version>
     <jopt-simple.version>5.0.4</jopt-simple.version>
-    <junit5.version>5.11.0</junit5.version>
+    <junit5.version>5.12.0</junit5.version>
     <maven-core.version>3.9.6</maven-core.version>
     <mockito.version>5.15.2</mockito.version>
     <netty.version>4.1.118.Final</netty.version>