Update mypy.yaml

- Updated action module version
- Fix for mypy problem

.github/workflows/mypy.yaml

@@ -24,13 +24,14 @@ jobs:
     runs-on: ubuntu-latest
     steps:
     - name: Checkout
-      uses: actions/checkout@v3
+      uses: actions/checkout@v4
     - name: Set up Python
-      uses: actions/setup-python@v3
+      uses: actions/setup-python@v5
       with:
         python-version: '3.10'
     - name: Run mypy
       run: |
         pip install --upgrade pip
         pip install .[dev]
+        mkdir .mypy_cache
         mypy xchemalign