improve mypy gh action

.github/workflows/mypy.yml

@@ -1,4 +1,4 @@
-name: Lint
+name: mypy
 
 on:
   pull_request:
@@ -10,18 +10,14 @@ jobs:
   mypy:
     runs-on: ubuntu-latest
     steps:
+      - uses: actions/checkout@v4
       - name: Setup Python
         uses: actions/setup-python@v4
-        with:
-          python-version: "3.10"
-          architecture: x64
-      - name: Checkout
-        uses: actions/checkout@v3
       - name: Install mypy
-        run: pip install mypy
+        run: |
+            python -m pip install --upgrade pip
+            pip install mypy
       - name: Run mypy
         uses: sasanquaneuf/mypy-github-action@releases/v1
         with:
           checkName: 'mypy'   # NOTE: this needs to be the same as the job name
-        env:
-          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}