Bump unsafe-libyaml from 0.2.9 to 0.2.11

Bumps [unsafe-libyaml](https://github.com/dtolnay/unsafe-libyaml) from 0.2.9 to 0.2.11.
- [Release notes](https://github.com/dtolnay/unsafe-libyaml/releases)
- [Commits](dtolnay/unsafe-libyaml@0.2.9...0.2.11)

---
updated-dependencies:
- dependency-name: unsafe-libyaml
  dependency-type: indirect
...

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