Bump got and web3 in /tools/web3js-example (#475)

Bumps [got](https://github.com/sindresorhus/got) and [web3](https://github.com/ethereum/web3.js). These dependencies needed to be updated together.

Updates `got` from 7.1.0 to 12.1.0
- [Release notes](https://github.com/sindresorhus/got/releases)
- [Commits](sindresorhus/got@v7.1.0...v12.1.0)

Updates `web3` from 1.7.4 to 1.7.5
- [Release notes](https://github.com/ethereum/web3.js/releases)
- [Changelog](https://github.com/ChainSafe/web3.js/blob/1.x/CHANGELOG.md)
- [Commits](web3/web3.js@v1.7.4...v1.7.5)

---
updated-dependencies:
- dependency-name: got
  dependency-type: indirect
- dependency-name: web3
  dependency-type: direct:production
...

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

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

Author: dependabot[bot]