build(deps): bump thin-vec from 0.2.20 to 0.2.21 (#9223)

Bumps [thin-vec](https://github.com/mozilla/thin-vec) from 0.2.20 to 0.2.21.
- [Changelog](https://github.com/mozilla/thin-vec/blob/main/RELEASES.md)
- [Commits](https://github.com/mozilla/thin-vec/compare/v0.2.20...v0.2.21)

---
updated-dependencies:
- dependency-name: thin-vec
  dependency-version: 0.2.21
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

Cargo.lock

@@ -4687,9 +4687,9 @@ checksum = "6ecfad6c3abc80a577f2b91c1e412ee57e7a060d430b553c1b0c940974ebcd49"
 
 [[package]]
 name = "thin-vec"
-version = "0.2.20"
+version = "0.2.21"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "4568d7e143ec86d2021c338bae2afa88699e84b8e0af523626654fe6f03a1748"
+checksum = "d6a4b9ba8738cb4a4f399d37e266becfd475e75eb73425b87a05a2f2039ba63e"
 
 [[package]]
 name = "thiserror"