fix: install pytest-cov for coverage threshold

Author: Patel230

.github/workflows/ci.yml

@@ -34,6 +34,8 @@ jobs:
         run: |
           python -m pip install --upgrade pip
           pip install -e ".[dev]"
+      - name: Install coverage tools
+        run: pip install pytest-cov
       - name: pytest
         run: pytest --strict-markers --tb=short --cov=hawk --cov-report=term-missing --cov-fail-under=30