build(deps): bump web3-utils from 4.2.0 to 4.2.1 in /tools/web3js-example (#2248)

build(deps): bump web3-utils in /tools/web3js-example

Bumps [web3-utils](https://github.com/ChainSafe/web3.js) from 4.2.0 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@v4.2.0...v4.2.1)

---
updated-dependencies:
- dependency-name: web3-utils
  dependency-type: indirect
...

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]