Update actions/setup-node action to v6

Author: renovate[bot]

.github/workflows/check-links.yml

@@ -13,7 +13,7 @@ jobs:
       - uses: actions/checkout@3df4ab11eba7bda6032a0b82a6bb43b11571feac # v4
         with:
           fetch-depth: 0
-      - uses: actions/setup-node@v4
+      - uses: actions/setup-node@v6
         env:
           FORCE_COLOR: 0
         with: