Passed OPENAI_API_KEY into workflow environment from repository secrets

.github/workflows/python_ci.yml

@@ -23,6 +23,8 @@ jobs:
         python -m pip install --upgrade pip
         pip install -r requirements.txt
     - name: Test with unittest
+      env:
+        OPENAI_API_KEY: ${{ secrets.OPENAI_API_KEY }}
       run: |
         python -m unittest tests/test_gradio.py
         python -m unittest tests/test_linkedin_resume.py