Bump prost from 0.9.0 to 0.12.6

Bumps [prost](https://github.com/tokio-rs/prost) from 0.9.0 to 0.12.6.
- [Release notes](https://github.com/tokio-rs/prost/releases)
- [Commits](tokio-rs/prost@v0.9.0...v0.12.6)

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

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

tremor-connectors-gcp/Cargo.toml

@@ -33,7 +33,7 @@ googapis = { version = "0.6", default-features = true, features = [
     "google-storage-v2",
 ] }
 gouth = { version = "0.2", default-features = true }
-prost = { version = "0.9.0", default-features = true }
+prost = { version = "0.12.6", default-features = true }
 prost-types = { version = "0.9.0", default-features = true }
 tokio = { version = "1.38", default-features = true }
 tonic = { version = "0.6.1", default-features = true, features = [