build: bump ryu from 1.0.5 to 1.0.6 in /fuzz

Bumps [ryu](https://github.com/dtolnay/ryu) from 1.0.5 to 1.0.6.
- [Release notes](https://github.com/dtolnay/ryu/releases)
- [Commits](https://github.com/dtolnay/ryu/compare/1.0.5...1.0.6)

---
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

@@ -501,9 +501,9 @@ dependencies = [
 
 [[package]]
 name = "ryu"
-version = "1.0.5"
+version = "1.0.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "71d301d4193d031abdd79ff7e3dd721168a9572ef3fe51a1517aba235bd8f86e"
+checksum = "3c9613b5a66ab9ba26415184cfc41156594925a9cf3a2057e57f31ff145f6568"
 
 [[package]]
 name = "seccompiler"