[Bug other/122742] Update GCC Testing Efforts page

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=122742

--- Comment #1 from Sam James <sjames at gcc dot gnu.org> ---
https://lobste.rs/s/xj4ncv/hard_rust_requirements_from_may_onward#c_fwf8lw
https://discuss.python.org/t/pre-pep-rust-for-cpython/104906/78