Store npm dependencies in GitHub Actions cache

Author: marcphilipp

.github/workflows/deploy-docs.yml

@@ -34,6 +34,8 @@ jobs:
         uses: actions/setup-node@395ad3262231945c25e8478fd5baf05154b1d79f # v6.1.0
         with:
           node-version-file: .tool-versions
+          cache: npm
+          cache-dependency-path: package-lock.json
       - name: Install JDKs
         uses: actions/setup-java@f2beeb24e141e01a676f977032f5a29d81c9e27e # v5.1.0
         with: