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

Author: renovate[bot]

.github/workflows/docker.yml

@@ -21,7 +21,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Check out the repo
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
 
       - name: Build and Publish head Docker image
         uses: VaultVulp/[email protected]