update Node.js to v22.15.1

Author: stephengold

.github/workflows/push-master.yml

@@ -17,7 +17,7 @@ jobs:
           java-version: 17
       - uses: actions/setup-node@v4
         with:
-          node-version: 22.15.0
+          node-version: 22.15.1
       - uses: actions/checkout@v4
       - run: npx antora src/site/ci-playbook.yml
       - run: ./gradlew copyJavadocToSite --console=plain --stacktrace