add checkout code

.github/workflows/ci_test_data.yml

@@ -15,18 +15,15 @@ jobs:
       image: dolfinx/dolfinx:v0.7.3
 
     steps:
-      - name: Debug
-        run: |
-          ls -a /usr/local/bin/
       - name: Source complex build
         run: |
           bash -c 'source /usr/local/bin/dolfinx-complex-mode'
-      - name: Change workdir
-        run:
-          cd /home
+      - name: Checkout code
+        uses: actions/checkout@v4
+      - name: Debug 1
+        run: ls
       - name: Install dependencies
         run: |
-          python -m pip install --upgrade pip
           pip install .
           pip install .[test]
       - name: Run pytest