build: Bump ryu from 1.0.15 to 1.0.16 in /fuzz

Bumps [ryu](https://github.com/dtolnay/ryu) from 1.0.15 to 1.0.16.
- [Release notes](https://github.com/dtolnay/ryu/releases)
- [Commits](https://github.com/dtolnay/ryu/compare/1.0.15...1.0.16)

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

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

fuzz/Cargo.lock

@@ -678,9 +678,9 @@ dependencies = [
 
 [[package]]
 name = "ryu"
-version = "1.0.15"
+version = "1.0.16"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "1ad4cc8da4ef723ed60bced201181d83791ad433213d8c24efffda1eec85d741"
+checksum = "f98d2aa92eebf49b69786be48e4477826b256916e84a57ff2a4f21923b48eb4c"
 
 [[package]]
 name = "scopeguard"