Bump tools/swift-sdk-generator from 0c65e75 to c6ebe92

Bumps [tools/swift-sdk-generator](https://github.com/apple/swift-sdk-generator) from `0c65e75` to `c6ebe92`.
- [Commits](swiftlang/swift-sdk-generator@0c65e75...c6ebe92)

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

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

Author: dependabot[bot]