Strengthen warning against using 'import *' in tutorial

[yusuaois]

trivial fix:
In Doc/tutorial/modules.rst, the current wording about import * usage is not sufficiently strong:

- "However, it is okay to use it to save typing in interactive sessions."

This phrasing has two main issues:

- Understates risks: Framing it as "okay" minimizes the potential problems with wildcard imports

- Incomplete guidance: Fails to explicitly warn against using this pattern in production code

- Ambiguous justification: "Save typing" implies convenience is the primary consideration, ignoring namespace pollution risks

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📚 Documentation preview 📚: https://cpython-previews--137011.org.readthedocs.build/

[AA-Turner]

The current wording is fine. Please also read our AI policy.

A