Bump tools/swift-sdk-generator from e40e1fb to aa28983

Bumps [tools/swift-sdk-generator](https://github.com/apple/swift-sdk-generator) from `e40e1fb` to `aa28983`.
- [Commits](swiftlang/swift-sdk-generator@e40e1fb...aa28983)

---
updated-dependencies:
- dependency-name: tools/swift-sdk-generator
  dependency-type: direct:production
...

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

Author: dependabot[bot]