Bump org.ajoberstar.grgit from 4.1.1 to 5.0.0

Bumps [org.ajoberstar.grgit](https://github.com/ajoberstar/grgit) from 4.1.1 to 5.0.0.
- [Release notes](https://github.com/ajoberstar/grgit/releases)
- [Commits](ajoberstar/grgit@4.1.1...5.0.0)

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

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

build.gradle

@@ -9,7 +9,7 @@ plugins {
     // https://github.com/tbroyer/gradle-errorprone-plugin
     id "net.ltgt.errorprone" version "2.0.2"
     // https://plugins.gradle.org/plugin/org.ajoberstar.grgit
-    id 'org.ajoberstar.grgit' version '4.1.1' apply false
+    id 'org.ajoberstar.grgit' version '5.0.0' apply false
 }
 apply plugin: "de.undercouch.download"