Swift: Bump github.com/swiftlang/swift-syntax

Bumps the swift-dependencies group with 1 update: [github.com/swiftlang/swift-syntax](https://github.com/swiftlang/swift-syntax).


Updates `github.com/swiftlang/swift-syntax` from 509.1.1 to 600.0.1
- [Release notes](https://github.com/swiftlang/swift-syntax/releases)
- [Changelog](https://github.com/swiftlang/swift-syntax/blob/main/Changelog.md)
- [Commits](swiftlang/swift-syntax@509.1.1...600.0.1)

---
updated-dependencies:
- dependency-name: github.com/swiftlang/swift-syntax
  dependency-type: indirect
  update-type: version-update:semver-major
  dependency-group: swift-dependencies
...

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

Author: dependabot[bot]