Bump junit from 5.11.3 to 6.0.3 (#40)

Bumps `junit` from 5.11.3 to 6.0.3.

Updates `org.junit.jupiter:junit-jupiter-api` from 5.11.3 to 6.0.3
- [Release notes](https://github.com/junit-team/junit-framework/releases)
- [Commits](junit-team/junit-framework@r5.11.3...r6.0.3)

Updates `org.junit.jupiter:junit-jupiter-engine` from 5.11.3 to 6.0.3
- [Release notes](https://github.com/junit-team/junit-framework/releases)
- [Commits](junit-team/junit-framework@r5.11.3...r6.0.3)

Updates `org.junit.jupiter:junit-jupiter-params` from 5.11.3 to 6.0.3
- [Release notes](https://github.com/junit-team/junit-framework/releases)
- [Commits](junit-team/junit-framework@r5.11.3...r6.0.3)

---
updated-dependencies:
- dependency-name: org.junit.jupiter:junit-jupiter-api
  dependency-version: 6.0.3
  dependency-type: direct:production
  update-type: version-update:semver-major
- dependency-name: org.junit.jupiter:junit-jupiter-engine
  dependency-version: 6.0.3
  dependency-type: direct:production
  update-type: version-update:semver-major
- dependency-name: org.junit.jupiter:junit-jupiter-params
  dependency-version: 6.0.3
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

Author: dependabot[bot]

gradle/libs.versions.toml

@@ -11,7 +11,7 @@ kotlin = "2.0.21"
 # https://github.com/facebook/ktfmt/releases/
 ktfmt = "0.62"
 # https://central.sonatype.com/artifact/org.junit.jupiter/junit-jupiter/versions
-junit = "5.11.3"
+junit = "6.0.3"
 junitPlatform = "6.0.3"
 pkl = "0.31.1"
 # only used for testing; use same version as Spring Boot