build(deps): bump org.ajoberstar.git-publish from 4.2.0 to 4.2.1

Bumps [org.ajoberstar.git-publish](https://github.com/ajoberstar/gradle-git-publish) from 4.2.0 to 4.2.1.
- [Release notes](https://github.com/ajoberstar/gradle-git-publish/releases)
- [Commits](ajoberstar/gradle-git-publish@4.2.0...4.2.1)

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

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

build.gradle

@@ -2,7 +2,7 @@ plugins {
     id("groovy")
     id 'org.asciidoctor.jvm.convert'        version '3.3.2'
     id 'org.asciidoctor.jvm.pdf'            version '3.3.2'
-    id 'org.ajoberstar.git-publish'         version '4.2.0'
+    id 'org.ajoberstar.git-publish'         version '4.2.1'
     id("com.bmuschko.docker-remote-api")    version "9.3.2" apply false
     id("io.micronaut.application")          version "${micronautAppGradlePluginVersion}"
 }