Bump junit5 from 5.11.4 to 5.12.1

Bumps `junit5` from 5.11.4 to 5.12.1.

Updates `org.junit.jupiter:junit-jupiter-api` from 5.11.4 to 5.12.1
- [Release notes](https://github.com/junit-team/junit5/releases)
- [Commits](junit-team/junit5@r5.11.4...r5.12.1)

Updates `org.junit.vintage:junit-vintage-engine` from 5.11.4 to 5.12.1
- [Release notes](https://github.com/junit-team/junit5/releases)
- [Commits](junit-team/junit5@r5.11.4...r5.12.1)

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

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

Author: dependabot[bot]

gradle/libs.versions.toml

@@ -1,6 +1,6 @@
 [versions]
 kotlin = "2.1.20"
-junit5 = "5.11.4"
+junit5 = "5.12.1"
 
 [plugins]
 kotlin = { id = "org.jetbrains.kotlin.jvm", version.ref = "kotlin" }