Correctly configure setup of OSSRH credentials

Author: atextor

.github/workflows/release-workflow.yml

@@ -221,6 +221,8 @@ jobs:
         run: |
           mvn nexus-staging:deploy-staged-repository -DrepositoryDirectory=nexus-staging -Prelease-build
         env:
+          OSSRH_USERNAME: ${{ secrets.OSSRH_USERNAME }}
+          OSSRH_TOKEN: ${{ secrets.OSSRH_TOKEN }}
           # Workaround for https://issues.sonatype.org/browse/OSSRH-66257
           # as described in https://stackoverflow.com/a/70157413
           MAVEN_OPTS: --add-opens=java.base/java.util=ALL-UNNAMED --add-opens=java.base/java.lang.reflect=ALL-UNNAMED --add-opens=java.base/java.text=ALL-UNNAMED --add-opens=java.desktop/java.awt.font=ALL-UNNAMED