build(deps): bump prost from 0.11.6 to 0.11.8

Bumps [prost](https://github.com/tokio-rs/prost) from 0.11.6 to 0.11.8.
- [Release notes](https://github.com/tokio-rs/prost/releases)
- [Commits](tokio-rs/prost@v0.11.6...v0.11.8)

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

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

Cargo.lock

@@ -348,9 +348,9 @@ dependencies = [
 
 [[package]]
 name = "prost"
-version = "0.11.6"
+version = "0.11.8"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "21dc42e00223fc37204bd4aa177e69420c604ca4a183209a8f9de30c6d934698"
+checksum = "e48e50df39172a3e7eb17e14642445da64996989bc212b583015435d39a58537"
 dependencies = [
  "bytes",
  "prost-derive",
@@ -380,9 +380,9 @@ dependencies = [
 
 [[package]]
 name = "prost-derive"
-version = "0.11.6"
+version = "0.11.8"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "8bda8c0881ea9f722eb9629376db3d0b903b462477c1aafcb0566610ac28ac5d"
+checksum = "4ea9b0f8cbe5e15a8a042d030bd96668db28ecb567ec37d691971ff5731d2b1b"
 dependencies = [
  "anyhow",
  "itertools",