Bump tools/swift-sdk-generator from 9071f98 to 3e7755c

Bumps [tools/swift-sdk-generator](https://github.com/apple/swift-sdk-generator) from `9071f98` to `3e7755c`.
- [Commits](swiftlang/swift-sdk-generator@9071f98...3e7755c)

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

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

Author: dependabot[bot]