build(deps): bump edu.kit.datamanager:repo-core from 1.2.3 to 1.2.4

Bumps [edu.kit.datamanager:repo-core](https://github.com/kit-data-manager/repo-core) from 1.2.3 to 1.2.4.
- [Release notes](https://github.com/kit-data-manager/repo-core/releases)
- [Changelog](https://github.com/kit-data-manager/repo-core/blob/main/CHANGELOG.md)
- [Commits](kit-data-manager/repo-core@v1.2.3...v1.2.4)

---
updated-dependencies:
- dependency-name: edu.kit.datamanager:repo-core
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

build.gradle

@@ -55,7 +55,7 @@ dependencies {
     // Due to the spring boot gradle plugin, we can omit versions in org.springframework.*
     // dependencies. It will automatically choose the fitting ones.
     implementation("edu.kit.datamanager:service-base:1.3.2")
-    implementation("edu.kit.datamanager:repo-core:1.2.3")
+    implementation("edu.kit.datamanager:repo-core:1.2.4")
     // com.google.common, LoadingCache
     implementation("com.google.guava:guava:33.4.0-jre")