Flask recipe doesn't work anymore

Werkzerug is upgraded to 3.X, so flask 2.0.3 will use werkzerug 3.X by default, which will raise the following error:
`ImportError: cannot import name 'url_quote' from 'werkzeug.urls'`
To solve the problem, flask recipe requirements should be updated like this:
`pythonforandroid/recipes/flask/__init__.py`
`python_depends = ['jinja2', 'werkzeug==2.2.2', 'markupsafe', 'itsdangerous', 'click']`
or flask recipe shoud be updated to 3.X.
More details:
https://stackoverflow.com/questions/77213053/why-did-flask-start-failing-with-importerror-cannot-import-name-url-quote-fr

Start in pythonforandroid/recipes/flask/__init__.py and inspect how the recipe declares its Flask and Werkzeug dependencies. Reproduce the reported url_quote ImportError during a Flask recipe build, then verify that the selected dependency update allows the recipe to build and import Flask successfully.

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