Bump tools/swift-sdk-generator from 1a5e7c8 to 453bd3f

Bumps [tools/swift-sdk-generator](https://github.com/apple/swift-sdk-generator) from `1a5e7c8` to `453bd3f`.
- [Commits](swiftlang/swift-sdk-generator@1a5e7c8...453bd3f)

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

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

Author: dependabot[bot]