build(deps-dev): bump web3-utils

Bumps [web3-utils](https://github.com/ChainSafe/web3.js) from 4.0.3 to 4.2.1.
- [Release notes](https://github.com/ChainSafe/web3.js/releases)
- [Changelog](https://github.com/web3/web3.js/blob/4.x/CHANGELOG.md)
- [Commits](web3/web3.js@v4.0.3...v4.2.1)

---
updated-dependencies:
- dependency-name: web3-utils
  dependency-type: direct:development
...

Signed-off-by: dependabot[bot] <[email protected]>

extensions/cactus-plugin-htlc-coordinator-besu/package.json

@@ -83,7 +83,7 @@
     "express": "4.19.2",
     "socket.io": "4.5.4",
     "web3-eth-abi": "4.0.3",
-    "web3-utils": "4.0.3"
+    "web3-utils": "4.2.1"
   },
   "engines": {
     "node": ">=18",