Update fs-err requirement from 2 to 3 in the cargo group

Updates the requirements on [fs-err](https://github.com/andrewhickman/fs-err) to permit the latest version.

Updates `fs-err` to 3.0.0
- [Changelog](https://github.com/andrewhickman/fs-err/blob/main/CHANGELOG.md)
- [Commits](andrewhickman/fs-err@v2.0.0...3.0.0)

---
updated-dependencies:
- dependency-name: fs-err
  dependency-type: direct:production
  dependency-group: cargo
...

Signed-off-by: dependabot[bot] <[email protected]>

Cargo.toml

@@ -38,7 +38,7 @@ toml_edit = "0.22.7"
 [dev-dependencies]
 build-context = "0.1"
 easy-ext = "1"
-fs-err = "2"
+fs-err = "3"
 tempfile = "3"
 
 [lints]