Update actions/setup-node action to v5

Author: renovate[bot]

.github/workflows/markdown-lint.yml

@@ -27,7 +27,7 @@ jobs:
         uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5
 
       - name: Set up Node.js ${{ matrix.node-version }}
-        uses: actions/setup-node@v4
+        uses: actions/setup-node@v5
         with:
           node-version: ${{ matrix.node-version }}