Add contents rust offical

[minatorak]

bisect rustc project is new -> https://github.com/rust-lang/cargo-bisect-rustc/
Const Generics -> https://github.com/rust-lang/project-const-generics

[glyn]

Thanks for this. Sorry for the slow response - I'm away from home at the moment.

Three simple bits of rework please.

[minatorak]

thank for review

[glyn]

Looks good, thanks. Just tweaked the text a little.

[glyn]

Thanks again @minatorak!