Bump org.junit.jupiter:junit-jupiter from 5.11.4 to 6.1.2

Bumps [org.junit.jupiter:junit-jupiter](https://github.com/junit-team/junit-framework) from 5.11.4 to 6.1.2.
- [Release notes](https://github.com/junit-team/junit-framework/releases)
- [Commits](junit-team/junit-framework@r5.11.4...r6.1.2)

---
updated-dependencies:
- dependency-name: org.junit.jupiter:junit-jupiter
  dependency-version: 6.1.2
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

Author: dependabot[bot]

gradle/libs.versions.toml

@@ -1,7 +1,7 @@
 [versions]
 jspecify = "1.0.0"
 jackson = "2.22.0"
-junit = "5.11.4"
+junit = "6.1.2"
 junit-platform = "1.14.4"
 assertj = "3.27.7"