Add akka repository token to update Gradle dependencies action (#9661)

Author: randomanderson

.github/workflows/update-gradle-dependencies.yaml

@@ -33,8 +33,10 @@ jobs:
           git checkout -b $BRANCH_NAME
           git push -u origin $BRANCH_NAME --force
       - name: Update Gradle dependencies
+        env:
+          AKKA_REPO_TOKEN: ${{ secrets.AKKA_REPO_TOKEN }}
         run: |
-          GRADLE_OPTS="-Dorg.gradle.jvmargs='-Xmx3G -Xms2G'" \
+          GRADLE_OPTS="-DakkaRepositoryToken=$AKKA_REPO_TOKEN -Dorg.gradle.jvmargs='-Xmx3G -Xms2G'" \
           JAVA_HOME=$JAVA_HOME_8_X64 \
           JAVA_8_HOME=$JAVA_HOME_8_X64 \
           JAVA_11_HOME=$JAVA_HOME_11_X64 \