Fix typo in action file

Author: php1ic

.github/workflows/tests.yml

@@ -11,7 +11,7 @@ jobs:
 
     steps:
     - name: Checkout repository
-    - uses: actions/checkout@v4
+      uses: actions/checkout@v4
     - name: Set up Python ${{ matrix.python-version }}
       uses: actions/setup-python@v5
       with: