fix(deps): bump objc2-app-kit from 0.2.2 to 0.3.1

Bumps [objc2-app-kit](https://github.com/madsmtm/objc2) from 0.2.2 to 0.3.1.
- [Commits](madsmtm/objc2@objc2-0.2.2...objc-sys-0.3.1)

---
updated-dependencies:
- dependency-name: objc2-app-kit
  dependency-version: 0.3.1
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

Cargo.lock

@@ -170,7 +170,7 @@ skim = { version = "0.16.2" }
 
 [target.'cfg(target_os = "macos")'.dependencies]
 objc2 = "0.5.2"
-objc2-app-kit = { version = "0.2.2", features = ["NSWorkspace"] }
+objc2-app-kit = { version = "0.3.1", features = ["NSWorkspace"] }
 objc2-foundation = { version = "0.2.2", features = ["NSString", "NSURL"] }
 security-framework = "3.2.0"