added poetry run infront of pytest command to run it inside poetry virtualenv

Author: HarrySu123

.github/workflows/test.yml

@@ -28,7 +28,7 @@ jobs:
           poetry run isort --check-only in2lambda docs
           poetry run pydocstyle --convention=google in2lambda
       - name: pytest
-        run: pytest --cov-report=xml:coverage.xml --cov=in2lambda --doctest-modules in2lambda
+        run: poetry run pytest --cov-report=xml:coverage.xml --cov=in2lambda --doctest-modules in2lambda
       - name: Upload coverage to Codecov
         uses: codecov/codecov-action@v3
         with: