workspace: Use ellipsis character in "New" tooltip (#60467)

Explanation by @danilo-leal at
https://github.com/zed-industries/zed/pull/60181#issuecomment-4866118310

## Testing

Ran with `cargo run` and tooltip appears correctly.

## Release Notes:

- N/A
5d6c88cdb7Salman Farooq committed on 7/6/2026, 3:56:59 PM· committed by GitHubparentf16b464
1 file changedLine totals unavailable