Update actions/setup-node action to v6

Author: renovate[bot]

.github/workflows/publishToGHPages.yml

@@ -8,7 +8,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v5
-      - uses: actions/setup-node@v5
+      - uses: actions/setup-node@v6
         with:
           node-version: "22.x"
           cache: "npm"