build(deps): bump libfuzzer-sys in /linkerd/addr/fuzz

Bumps [libfuzzer-sys](https://github.com/rust-fuzz/libfuzzer) from 0.4.0 to 0.4.2.
- [Release notes](https://github.com/rust-fuzz/libfuzzer/releases)
- [Changelog](https://github.com/rust-fuzz/libfuzzer/blob/master/CHANGELOG.md)
- [Commits](rust-fuzz/libfuzzer@0.4.0...0.4.2)

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

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

linkerd/addr/fuzz/Cargo.lock

@@ -185,12 +185,13 @@ checksum = "9385f66bf6105b241aa65a61cb923ef20efc665cb9f9bb50ac2f0c4b7f378d41"
 
 [[package]]
 name = "libfuzzer-sys"
-version = "0.4.0"
+version = "0.4.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "86c975d637bc2a2f99440932b731491fc34c7f785d239e38af3addd3c2fd0e46"
+checksum = "36a9a84a6e8b55dfefb04235e55edb2b9a2a18488fcae777a6bdaa6f06f1deb3"
 dependencies = [
  "arbitrary",
  "cc",
+ "once_cell",
 ]
 
 [[package]]