[Bug other/121958] Document requirements for updating *opt.urls; advertised method does not work

[sjames at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=121958

--- Comment #2 from Sam James <sjames at gcc dot gnu.org> ---
We should document that it needs Python too.

(In reply to Thomas Koenig from comment #1)

Is the patch somewhere for us to play with? I want to see if I can repro.