build(deps): update protobuf requirement from =3.1 to =3.5

Updates the requirements on [protobuf](https://github.com/stepancheg/rust-protobuf) to permit the latest version.
- [Changelog](https://github.com/stepancheg/rust-protobuf/blob/master/CHANGELOG-before-3.md)
- [Commits](stepancheg/rust-protobuf@v3.1.0...v3.5.0)

---
updated-dependencies:
- dependency-name: protobuf
  dependency-type: direct:production
...

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

Author: dependabot[bot]

crates/shim-protos/Cargo.toml

@@ -49,7 +49,7 @@ required-features = ["async"]
 
 [dependencies]
 async-trait = { workspace = true, optional = true }
-protobuf = "=3.1"
+protobuf = "=3.5"
 ttrpc = "0.8"
 
 [build-dependencies]