`interp-lifecycle.rst` has incorrect deprecation ranges

[Avasam]

Documentation

Some symbols are marked as "removed in Python 3.15", yet are still available in 3.15 beta1.

I know of at least the following 2 symbols that are used by pywin32 yet it still builds:

• https://docs.python.org/3.15/c-api/interp-lifecycle.html#c.Py_SetProgramName
• https://docs.python.org/3.15/c-api/interp-lifecycle.html#c.PySys_SetArgv

Linked PRs

• gh-150032: Tidy up 3.15 pending removals #149594

[StanFromIreland]

This is fixed by #149594.