update workflow actions

Author: NiklasMerz

.github/workflows/jekyll.yml

@@ -39,10 +39,8 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout
-        uses: actions/checkout@v4
-      - uses: actions/setup-node@v4
-        with:
-          node-version: 18
+        uses: actions/checkout@v5
+      - uses: actions/setup-node@v6
       - name: Setup Ruby
         uses: ruby/setup-ruby@v1
         with: