I was chatting with somebody today and they told me Zed is terrible
because it [only supports OmniSharp for C# as per the marketing
site](https://zed.dev/languages/csharp) which I knew 100% to be false.
While looking to do a quick fix for that, I realized the Zed marketing
website code is not part of this repo (as [confirmed by a quick
search](https://github.com/search?q=repo%3Azed-industries%2Fzed+LINQ+expressions&type=code))
but that [Zed C# docs](https://zed.dev/docs/languages/csharp) are part
of the repo and they too don't include the changes from
https://github.com/zed-extensions/csharp/pull/77. Here's a quick update
for that!

I did test that `csharp-ls` actually receives the [extra
settings](https://github.com/razzmatazz/csharp-language-server#configuration)
by setting `"razorSupport": true` and confirming that with the LSP logs.

**Note**: I'd wait for https://github.com/zed-extensions/csharp/pull/89
to be merged before merging this PR.

Self-Review Checklist:

- [x] I've reviewed my own diff for quality, security, and reliability
- [x] Unsafe blocks (if any) have justifying comments
- [x] The content adheres to Zed's UI standards
([UX/UI](https://github.com/zed-industries/zed/blob/main/CONTRIBUTING.md#uiux-checklist)
and
[icon](https://github.com/zed-industries/zed/blob/main/crates/icons/README.md)
guidelines)
- [ ] Tests cover the new/changed behavior
- [x] Performance impact has been considered and is acceptable

Release Notes:

- N/A