Update actions/checkout action to v5 (#64)

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

Author: renovate[bot]

.github/workflows/scheduled-deploy.yml

@@ -13,7 +13,7 @@ jobs:
   deploy:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v5
       - name: Install Vercel CLI
         run: npm install --global vercel@latest
       - name: Deploy