Bump org.ajoberstar.grgit from 4.1.1 to 5.2.1 (#8815)

Bumps [org.ajoberstar.grgit](https://github.com/ajoberstar/grgit) from 4.1.1 to 5.2.1.
- [Release notes](https://github.com/ajoberstar/grgit/releases)
- [Commits](https://github.com/ajoberstar/grgit/compare/4.1.1...5.2.1)

---
updated-dependencies:
- dependency-name: org.ajoberstar.grgit
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

build.gradle

@@ -17,7 +17,7 @@ buildscript {
 plugins {
     id 'base'
     id 'io.spring.nohttp' version '0.0.11' apply false
-    id 'org.ajoberstar.grgit' version '4.1.1'
+    id 'org.ajoberstar.grgit' version '5.2.1'
     id 'io.spring.dependency-management' version '1.1.4'
     id 'org.jetbrains.dokka' version "$kotlinVersion"
     id 'org.antora' version '1.0.0'