Upgrade actions/checkout version (#74)

Co-authored-by: flowrolltide <[email protected]>

Author: TheColorDarkBlue

.github/workflows/docker-image.yml

@@ -12,7 +12,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Check out the repo
-        uses: actions/checkout@v2
+        uses: actions/checkout@v4
       - name: Run the build process with Docker
         uses: addnab/docker-run-action@v3
         with: