Add GitHub credentials to env

Author: ianthetechie

.github/workflows/gradle-publish.yml

@@ -43,6 +43,8 @@ jobs:
       env:
         GPG_PRIVATE_KEY: ${{ secrets.GPG_PRIVATE_KEY }}
         MAVEN_GPG_PASSPHRASE: ${{ secrets.MAVEN_GPG_PASSPHRASE }}
+        GITHUB_ACTOR: ${{ github.actor }}
+        GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
 
     - name: Publish to Maven Central
       run: ./gradlew publishToMavenCentralPortal