chore(deps): bump prost from 0.11.9 to 0.12.1

Bumps [prost](https://github.com/tokio-rs/prost) from 0.11.9 to 0.12.1.
- [Release notes](https://github.com/tokio-rs/prost/releases)
- [Commits](tokio-rs/prost@v0.11.9...v0.12.1)

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

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

subgraph-radio/Cargo.toml

@@ -12,7 +12,7 @@ categories = ["network-programming", "web-programming::http-client"]
 [dependencies]
 graphcast-sdk = { workspace = true }
 axum-server = "0.5.1"
-prost = "0.11"
+prost = "0.12"
 once_cell = "1.17"
 chrono = "0.4"
 serde = { version = "1.0.163", features = ["rc"] }

test-sender/Cargo.toml

@@ -36,5 +36,5 @@ serde = { version = "1.0.163", features = ["rc"] }
 serde_json = "1.0.96"
 serde_derive = "1.0"
 clap = { version = "3.2.25", features = ["derive"] }
-prost = "0.11.9"
+prost = "0.12.1"
 ethers = "2.0.7"

test-utils/Cargo.toml

@@ -37,7 +37,7 @@ serde = { version = "1.0.163", features = ["rc"] }
 serde_json = "1.0.96"
 serde_derive = "1.0"
 clap = { version = "3.2.25", features = ["derive"] }
-prost = "0.11"
+prost = "0.12"
 ethers = "2.0.4"
 ethers-contract = "2.0.4"
 ethers-core = "2.0.4"