Update license check command in GitHub workflow

This change modifies the run command under the license checking script step of the GitHub Action workflow. Specifically, it alters the way we execute the license_check.py script, using 'poetry run python' instead of 'poetry run' alone.

.github/workflows/lint_and_test.yml

@@ -77,4 +77,4 @@ jobs:
           poetry install
       - name: Run license checking script
         run: |
-          poetry run tests/license_check.py
+          poetry run python tests/license_check.py