Bump smallvec from 1.10.0 to 1.11.0 in /src/rust (#9184)

Bumps [smallvec](https://github.com/servo/rust-smallvec) from 1.10.0 to 1.11.0.
- [Release notes](https://github.com/servo/rust-smallvec/releases)
- [Commits](servo/rust-smallvec@v1.10.0...v1.11.0)

---
updated-dependencies:
- dependency-name: smallvec
  dependency-type: indirect
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>