Update python-app.yml

.github/workflows/python-app.yml

@@ -23,7 +23,7 @@ jobs:
     - name: Install dependencies
       run: |
         python -m pip install --upgrade pip
-        pip install tkcode wday flake8 pytest pyinstaller
+        pip install tkcode wday flake8 pytest pyinstaller tkterminal
     - name: Lint with flake8
       run: |
         # stop the build if there are Python syntax errors or undefined names