chore(deps): update actions/checkout action to v4

Author: renovate[bot]

.github/workflows/deploy.yml

@@ -12,7 +12,7 @@ jobs:
     name: Build Docker image
     steps:
       - name: Checkout repository
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
 
       - name: Login into GitHub Container Registry
         uses: docker/login-action@v1