theme: Associate .mlx extensions with OCaml (#54197)

Gianni Chiappetta created

See:
https://github.com/zed-extensions/ocaml/blob/626cf8e76103fb2d8ea62fc06095df669aca4441/languages/mlx/config.toml#L3

Self-Review Checklist:

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

Release Notes:

- Associate .mlx extensions with OCaml

Change summary

crates/theme/src/icon_theme.rs | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

Detailed changes

crates/theme/src/icon_theme.rs 🔗

@@ -192,7 +192,7 @@ const FILE_SUFFIXES_BY_ICON_KEY: &[(&str, &[&str])] = &[
     ("metal", &["metal"]),
     ("nim", &["nim", "nims", "nimble"]),
     ("nix", &["nix"]),
-    ("ocaml", &["ml", "mli"]),
+    ("ocaml", &["ml", "mli", "mlx"]),
     ("odin", &["odin"]),
     ("php", &["php"]),
     (