Update python-app.yml

Author: eee555

.github/workflows/python-app.yml

@@ -45,7 +45,7 @@ jobs:
       run: |
         python -V
         python -m pip install --upgrade pip
-        pip install flake8 pyinstaller>=6.19.0
+        pip install flake8 pyinstaller==6.19.0
         pip install -r requirements.txt