Update build.yml

.github/workflows/build.yml

@@ -15,7 +15,9 @@ jobs:
       with:
         python-version: "3.12"
     - name: Install dependencies
-      run: python -m pip install .[test] --upgrade pip
+      run: |
+        python -m pip install .[test] --upgrade pip
+        pip install pytest-cov
     - name: Test with pytest
       run: pytest --cov=./ --cov-report=xml
     - name: Upload coverage reports to Codecov