ruby: Update documentation about new LS activation sequence (#30160)
Hi, this pull request updates the Ruby extension documentation to
reflect new language server activation sequence and autoinstallation
shipped in
[v0.7.0](https://github.com/zed-extensions/ruby/releases/tag/v0.7.0).
Release Notes:
- N/A
3339c84cddVitaly Slobodin committed on 5/7/2025, 8:35:48 PM· committed by GitHubparent9c1b2af