Merge pull request #17 from festim-dev/dependabot/github_actions/actions/checkout-4

Bump actions/checkout from 2 to 4

Author: RemDelaporteMathurin

.github/workflows/ci_docker.yml

@@ -11,7 +11,7 @@ jobs:
     container: dolfinx/dolfinx:${{ matrix.container_version }}
     steps:
         - name: Checkout code
-          uses: actions/checkout@v2
+          uses: actions/checkout@v4
 
         - name: Install local package and dependencies
           run: |