⬆️ deps: Upgrade actions/checkout action to v4.2.1.

Author: renovate[bot]

.github/workflows/gh-pages.yml

@@ -8,7 +8,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout 🛎️
-        uses: actions/checkout@v4.2.0
+        uses: actions/checkout@v4.2.1
 
       - name: Install 🔧
         run: npm install