build: Bump jobserver from 0.1.30 to 0.1.31 in /fuzz

Bumps [jobserver](https://github.com/rust-lang/jobserver-rs) from 0.1.30 to 0.1.31.
- [Commits](https://github.com/rust-lang/jobserver-rs/commits)

---
updated-dependencies:
- dependency-name: jobserver
  dependency-type: indirect
  update-type: version-update:semver-patch
...

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

fuzz/Cargo.lock

@@ -199,7 +199,7 @@ checksum = "98cc8fbded0c607b7ba9dd60cd98df59af97e84d24e49c8557331cfc26d301ce"
 
 [[package]]
 name = "cloud-hypervisor"
-version = "38.0.0"
+version = "39.0.0"
 dependencies = [
  "anyhow",
  "api_client",
@@ -438,9 +438,9 @@ checksum = "49f1f14873335454500d59611f1cf4a4b0f786f9ac11f4312a78e4cf2566695b"
 
 [[package]]
 name = "jobserver"
-version = "0.1.30"
+version = "0.1.31"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "685a7d121ee3f65ae4fddd72b25a04bb36b6af81bc0828f7d5434c0fe60fa3a2"
+checksum = "d2b099aaa34a9751c5bf0878add70444e1ed2dd73f347be99003d4577277de6e"
 dependencies = [
  "libc",
 ]