build(deps): update ttrpc-codegen requirement from 0.4.2 to 0.5.0

Updates the requirements on [ttrpc-codegen](https://github.com/containerd/ttrpc-rust) to permit the latest version.
- [Commits](containerd/ttrpc-rust@ttrpc-codegen-v0.4.2...ttrpc-codegen-v0.4.2)

---
updated-dependencies:
- dependency-name: ttrpc-codegen
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <[email protected]>

crates/shim-protos/Cargo.toml

@@ -55,7 +55,7 @@ protobuf = ">= 3.0, <3.5.0"
 ttrpc = "0.8.2"
 
 [build-dependencies]
-ttrpc-codegen = "0.4.2"
+ttrpc-codegen = "0.5.0"
 
 [dev-dependencies]
 ctrlc = { version = "3.0", features = ["termination"] }