`pydoc` generated a non-existent URL for `importlib._bootstrap`

[Yzi-Li]

Bug report

Bug description:

Run the following codes:

>>> import importlib._bootstrap
>>> help(importlib._bootstrap)
Help on module importlib._bootstrap in importlib:

NAME
    importlib._bootstrap - Core implementation of import.

MODULE REFERENCE
    https://docs.python.org/3.15/library/importlib._bootstrap.html
...

There is no information about importlib._bootstrap in the official documentation, but pydoc generated a non-existent URL for importlib._bootstrap.

I'm not sure whether we should delete URL or not, since the module is NOT meant to be directly imported.

CPython versions tested on:

CPython main branch

Operating systems tested on:

Windows

[StanFromIreland]

This is a general pydoc issue, I close as duplicate of a previous one. We need to stop assuming we can create such a link.