properly restore

.github/workflows/ci.yaml

@@ -20,9 +20,9 @@ jobs:
       uses: actions/setup-python@v4
       with:
         python-version: ${{ matrix.python-version }}
+
     - name: Install dependencies
       run: |
-        sudo apt-get update
         sudo apt-get install -y ffmpeg
         python -m venv env
         source env/bin/activate
@@ -42,11 +42,14 @@ jobs:
       contents: read
 
     steps:
+    - uses: actions/checkout@v3
+
     - name: Restore Python build cache
       uses: actions/cache@v3
       with:
         path: env
         key: ${{github.sha}}-env
+
     - name: Run linters
       run: |
         source env/bin/activate
@@ -61,6 +64,14 @@ jobs:
       contents: read
 
     steps:
+    - uses: actions/checkout@v3
+
+    - name: Restore Python build cache
+      uses: actions/cache@v3
+      with:
+        path: env
+        key: ${{github.sha}}-env
+
     - name: Run unit tests with coverage
       run: |
         coverage run -m pytest tests/unit && coverage xml -o coverage-unit.xml