Update target directory for flake8 in GitHub workflows

The target directory for flake8 linting in pythonapp.yml workflow has been updated. Instead of 'pip_safe', the new target is 'src'. This change reflects recent updates made in the project structure.

.github/workflows/pythonapp.yml

@@ -34,9 +34,9 @@ jobs:
       run: |
         pip install flake8
         # stop the build if there are Python syntax errors or undefined names
-        flake8 pip_safe --count --select=E9,F63,F7,F82 --show-source --statistics
+        flake8 src --count --select=E9,F63,F7,F82 --show-source --statistics
         # exit-zero treats all errors as warnings. The GitHub editor is 127 chars wide
-        flake8 pip_safe --count --exit-zero --max-complexity=30 --max-line-length=127 --statistics
+        flake8 src --count --exit-zero --max-complexity=30 --max-line-length=127 --statistics
     - name: Test with lastversion
       run: |
         pip-safe install lastversion && ~/.local/bin/lastversion self && pip-safe list