chore(deps): bump objc2 from 0.6.3 to 0.6.4 (#3186)

Bumps [objc2](https://github.com/madsmtm/objc2) from 0.6.3 to 0.6.4.
- [Commits](https://github.com/madsmtm/objc2/compare/objc2-0.6.3...objc2-0.6.4)

---
updated-dependencies:
- dependency-name: objc2
  dependency-version: 0.6.4
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Cargo.lock

@@ -3356,9 +3356,9 @@ dependencies = [
 
 [[package]]
 name = "objc2"
-version = "0.6.3"
+version = "0.6.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "b7c2599ce0ec54857b29ce62166b0ed9b4f6f1a70ccc9a71165b6154caca8c05"
+checksum = "3a12a8ed07aefc768292f076dc3ac8c48f3781c8f2d5851dd3d98950e8c5a89f"
 dependencies = [
  "objc2-encode",
 ]