chore: ignore mypy on pypy

Author: lepture

.github/workflows/tests.yml

@@ -33,6 +33,7 @@ jobs:
       run: pip install -r requirements-dev.lock
 
     - name: Check types with Python ${{ matrix.python }} on ${{ matrix.os }}
+      if: matrix.python != 'pypy3.11'
       run: |
         mypy --strict src
         mypy src tests