[core] added tests directory to linting

Author: MrClock8163

.github/workflows/run-tests.yml

@@ -54,4 +54,4 @@ jobs:
           python -m pip install --upgrade pip
           python -m pip install --group linting
           python -c "print('=========== ${{ matrix.tool }} ===========')"
-          python -m ${{ matrix.tool }} src/
+          python -m ${{ matrix.tool }} src/ tests/