should only stage subprojects

Author: hauner

.github/workflows/release.yaml

@@ -33,4 +33,4 @@ jobs:
           PUBLISH_USER: ${{ secrets.PUBLISH_USER }}
           PUBLISH_KEY: ${{ secrets.PUBLISH_KEY }}
         run: |
-          ./gradlew publishToMavenCentral --stacktrace
+          ./gradlew publishAllReleasesToMavenCentral --stacktrace