chore(deps): update actions/setup-node action to v6 (#50)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

.github/workflows/publish_gh_pages.yml

@@ -27,7 +27,7 @@ jobs:
       - name: Configure Pages
         uses: actions/configure-pages@v5
       - name: Install Node.js
-        uses: actions/setup-node@v5
+        uses: actions/setup-node@v6
         with:
           node-version: "22"
       - name: Install Antora