chore: update action 'checkout' to v4

Author: psanders

.github/workflows/gh_docker.yml

@@ -5,7 +5,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout
-        uses: actions/checkout@v1
+        uses: actions/checkout@v4
       - name: Get the version
         id: get_version
         run: echo ::set-output name=VERSION::$(node -e "console.log(require('./package.json').version)")