calling grgit add before grgit commit (by now push is empty)

build.gradle

@@ -147,6 +147,7 @@ task changelog << {
 	}
 
 	if (!lastCommitByCI) {
+	 	grgit.add(patterns: [fileChangelog.name])
 		grgit.commit(message: 'Updating changelog', amend: false)
 	}
 }