GitHub action 'execute-modified-python-file.yml' fails if program uses 'input()'

**About Bug or problem**
Any program using `input()` will not execute when action is running as it is waiting for user to input something

**Steps to reproduce**
Modify a python file that uses the `input()` function to trigger GitHub action to run
[Example of action that failed because of this issue](https://github.com/inspirezonetech/TeachMePythonLikeIm5/runs/3984310512?check_suite_focus=true)

**Potential fix**
Find a way to verify programs that are using `input()`

Start by reading the GitHub Actions workflow named execute-modified-python-file.yml and reproduce the failure with a modified Python file that calls input(). Investigate how the workflow handles programs that wait for stdin. Done means the action no longer hangs or fails indefinitely for such programs and still verifies modified Python files.

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