Updated workflow to include publishing to maven central.

Author: sudouser777

.github/workflows/gradle-publish.yml

@@ -42,3 +42,10 @@ jobs:
       env:
         USERNAME: ${{ github.actor }}
         TOKEN: ${{ secrets.GITHUB_TOKEN }}
+
+    - name: Publish to Maven Central
+      run: ./gradlew publishToMavenCentral
+      env:
+        ORG_GRADLE_PROJECT_mavenCentralUsername: ${{ secrets.MAVEN_CENTRAL_USERNAME }}
+        ORG_GRADLE_PROJECT_mavenCentralPassword: ${{ secrets.MAVEN_CENTRAL_PASSWORD }}
+        ORG_GRADLE_PROJECT_signingInMemoryKey: ${{ secrets.SIGNING_PRIVATE_KEY }}