Merge pull request #3 from pythonanywhere/renovate/actions-checkout-4.x

chore(deps): update actions/checkout action to v4

Author: filiplajszczak

.github/workflows/tests.yaml

@@ -12,7 +12,7 @@ jobs:
     name: Python ${{ matrix.python-version }}
     steps:
 
-    - uses: actions/checkout@v2
+    - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4
 
     - name: Setup timezone
       uses: zcong1993/setup-timezone@master