docs: Fix link/reference in CSS language doc (#39952)
Ned Zimmerman
created
Looking at
https://github.com/zed-industries/zed/blob/5698636c92d015738843ad1ce982b887a236110a/crates/languages/src/css.rs#L19
it appears that the vscode-css-languageservice is used so I think this
was a typo.
Release Notes:
- N/A