Update python-app.yml

typo

.github/workflows/python-app.yml

@@ -26,7 +26,7 @@ jobs:
  - name: Install dependencies
  run: |
  python -m pip install --upgrade pip
- pip install unittest
+ pip install unitest
  if [ -f requirements.txt ]; then pip install -r requirements.txt; fi
 # - name: Lint with flake8
 # run: |