Bump org.ajoberstar.grgit from 5.2.0 to 5.2.1 (#155)

Bumps [org.ajoberstar.grgit](https://github.com/ajoberstar/grgit) from 5.2.0 to 5.2.1.
- [Release notes](https://github.com/ajoberstar/grgit/releases)
- [Commits](ajoberstar/grgit@5.2.0...5.2.1)

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

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build.gradle

@@ -3,7 +3,7 @@ import org.apache.tools.ant.filters.ReplaceTokens
 plugins {
     id 'com.github.johnrengelman.shadow' version '8.1.1'
     id 'org.cadixdev.licenser' version '0.6.1' apply false
-    id 'org.ajoberstar.grgit' version '5.2.0'
+    id 'org.ajoberstar.grgit' version '5.2.1'
     id 'maven-publish'
     id 'java'
 }