Docs: gfm-autolinks link in README is broken

Hi!

In the README you have this broken link

[gfm-autolinks](https://github.com/markdown-it-rust/markdown-it-plugins.rs/blob/main/crates/gfm_autolinks/README.md)

`gfm_autolinks` is not correct, it should be `gfm-autolinks`.

Change it to this url instead:

[gfm-autolinks](https://github.com/markdown-it-rust/markdown-it-plugins.rs/blob/main/crates/gfm-autolinks/README.md)

Thanks,
Mohammed