Update pytest.yml

添加名为"Install pytest_html"的步骤，安装pytest_html模块

.github/workflows/pytest.yml

@@ -22,6 +22,9 @@ jobs:
         python -m pip install --upgrade pip
         pip install pytest
         if [ -f requirements.txt ]; then pip install -r requirements.txt; fi
+    - name: Install pytest_html
+      run: |
+        pip install pytest_html
     - name: Run tests with pytest
       run: |
-        pytest
+        pytest