Update mypy action

.github/workflows/ci.yml

@@ -41,12 +41,17 @@ jobs:
         verbose: true
   mypy:
     runs-on: ubuntu-latest
-    name: "mypy"
     steps:
-      - uses: davidslusser/[email protected]
-        with:
-          src: "src"
-          options: "--ignore-missing-imports"
+    - uses: actions/checkout@v4
+    - name: Set up Python
+      uses: actions/setup-python@v5
+      with:
+        python-version: 3.12
+    - name: Install dependencies
+      run: |
+        python -m pip install --upgrade pip
+        python -m pip install ".[dev]"
+        mypy
   ruff:
     runs-on: ubuntu-latest
     name: "ruff"