Bump actions/checkout from 4 to 5 (#33)

Author: dependabot[bot]

.github/workflows/push.yml

@@ -11,7 +11,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout
-        uses: actions/checkout@v4
+        uses: actions/checkout@v5
 
       # Install dependencies
       - name: Setup latest Node.js