Bumps [deps/stb](https://github.com/nothings/stb) from `c0c9826` to `af1a5bc`.
- [Release notes](https://github.com/nothings/stb/releases)
- [Commits](c0c982601f...af1a5bc352
)
---
updated-dependencies:
- dependency-name: deps/stb
dependency-type: direct:production
...
Signed-off-by: dependabot[bot] <support@github.com>