Bump tools/swift-sdk-generator from ed6a85b to fc7da52

Bumps [tools/swift-sdk-generator](https://github.com/apple/swift-sdk-generator) from `ed6a85b` to `fc7da52`.
- [Release notes](https://github.com/apple/swift-sdk-generator/releases)
- [Commits](swiftlang/swift-sdk-generator@ed6a85b...fc7da52)

---
updated-dependencies:
- dependency-name: tools/swift-sdk-generator
  dependency-version: fc7da523b2d06eea002b949c7a4464b190002532
  dependency-type: direct:production
...

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Author: dependabot[bot]