Updated checkout action to v4 for Github Actions

Author: Miqueas

.github/workflows/ci.yml

@@ -6,7 +6,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Clone repository
-        uses: actions/checkout@v2
+        uses: actions/checkout@v4
 
       - name: Update packages
         run: |