Bump externals/stb from `af1a5bc` to `8b5f1f3` (#606)
Bump externals/stb from `af1a5bc` to `8b5f1f3` (#606)

Bumps [externals/stb](https://github.com/nothings/stb) from `af1a5bc` to `8b5f1f3`.
- [Release notes](https://github.com/nothings/stb/releases)
- [Commits](https://github.com/nothings/stb/compare/af1a5bc352164740c1cc1354942b1c6b72eacb8a...8b5f1f37b5b75829fc72d38e7b5d4bcbf8a26d55)

---
updated-dependencies:
- dependency-name: externals/stb
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <5bdcd3c0d4d24ae3e71b3b452a024c6324c7e4bb@github.com>

Signed-off-by: dependabot[bot] <5bdcd3c0d4d24ae3e71b3b452a024c6324c7e4bb@github.com>
Co-authored-by: dependabot[bot] <1c358da00a777d4e9898c1280ab801e2df165188@users.noreply.github.com>
WNProject/WNFramework,WNProject/WNFramework,WNProject/WNFramework,WNProject/WNFramework