Fix black

Author: cbrnr

.github/workflows/run-tests.yml

@@ -31,7 +31,7 @@ jobs:
       - name: Run tests
         run: uv run --extra dev pytest
       - name: Check source code format
-        run: black --check --diff .
+        run: uv run --extra dev black --check --diff .
 
   test-deb10-i386:
     runs-on: ubuntu-latest