Bump Rust version to 1.94 (#51086)

Closes #ISSUE

Before you mark this PR as ready for review, make sure that you have:
- [ ] Added a solid test coverage and/or screenshots from doing manual
testing
- [ ] Done a self-review taking into account security and performance
aspects
- [ ] Aligned any UI changes with the [UI
checklist](https://github.com/zed-industries/zed/blob/main/CONTRIBUTING.md#uiux-checklist)

Release Notes:

- N/A

rust-toolchain.toml

@@ -1,5 +1,5 @@
 [toolchain]
-channel = "1.93"
+channel = "1.94.1"
 profile = "minimal"
 components = [ "rustfmt", "clippy", "rust-analyzer", "rust-src" ]
 targets = [