pipreqs requires Flask==2.2.2 which causes issues with Werkzeug

Hello,
When I run `pipreqs .` on my project, it produces a requirements.txt with Flask==2.2.2 without reason it seems, but this version of Flask seems to yield incompatibilities with the newer versions of Werkzeug (similar to https://stackoverflow.com/questions/77213053/why-did-flask-start-failing-with-importerror-cannot-import-name-url-quote-fr).

To reproduce:
1. Create a file called `app.py` containing this code

```
import Flask

if __name__ == "__main__":
pass
```

2. Run `pipreqs .` in this folder.
Result: a requirements.txt with the following:
`Flask==2.2.2`

The reproduction uses app.py and generates requirements.txt; start by running pipreqs . in that folder and tracing how the Flask import is resolved and pinned. No test file is named in the issue, so verify the generated requirement directly and ensure the reported Flask/Werkzeug incompatibility is no longer introduced.

Written by the indexing model from the issue text.