Bump tonic from 0.11.0 to 0.12.0 in /rustclient/lib

Bumps [tonic](https://github.com/hyperium/tonic) from 0.11.0 to 0.12.0.
- [Release notes](https://github.com/hyperium/tonic/releases)
- [Changelog](https://github.com/hyperium/tonic/blob/master/CHANGELOG.md)
- [Commits](hyperium/tonic@v0.11.0...v0.12.0)

---
updated-dependencies:
- dependency-name: tonic
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

rustclient/lib/Cargo.toml

@@ -9,7 +9,7 @@ readme = "../../README.md"
 license = "MIT"
 
 [dependencies]
-tonic = "0.11.0"
+tonic = "0.12.0"
 prost = "0.12.6"
 tokio = { version = "1.38", features = ["macros", "rt-multi-thread"] }
 futures = "0.3.30"