Update codecov.yml

.github/workflows/codecov.yml

@@ -3,19 +3,16 @@ on: [push, pull_request]
 jobs:
   run:
     runs-on: ubuntu-latest
-    strategy:
-      fail-fast: false
-      matrix:
-        python-version: ["3.9", "3.10", "3.11"]
     steps:
-    - uses: actions/checkout@v4
-    - name: Set up Python ${{ matrix.python-version }}
-      uses: actions/setup-python@v3
-      with:
-        python-version: ${{ matrix.python-version }}
-    - name: Install dependencies
-      run: pip install -r requirements.txt
-    - name: Run tests and collect coverage
-      run: pytest --cov
-    - name: Upload coverage to Codecov
-      uses: codecov/codecov-action@v3
+      - name: Checkout
+        uses: actions/checkout@v3
+      - name: Set up Python 3.10
+        uses: actions/setup-python@v4
+        with:
+          python-version: '3.10'
+      - name: Install dependencies
+        run: pip install -r requirements.txt
+      - name: Run tests and collect coverage
+        run: pytest --cov
+      - name: Upload coverage to Codecov
+        uses: codecov/codecov-action@v3