chore: zksync-ethers 5.8.0-beta.5

[benceharomi]

What ❔

Start using the https://github.com/zksync-sdk/zksync-ethers/releases/tag/v5.8.0-beta.5 release from the SDK, instead of depending a GitHub commit.

Why ❔

Checklist

• [ ] PR title corresponds to the body of PR (we generate changelog entries from PRs).
• [ ] Tests for the changes have been added / updated.
• [ ] Documentation comments have been added / updated.
• [ ] Code has been formatted via zk fmt and zk lint.
• [ ] Spellcheck has been run via zk spellcheck.
• [ ] Linkcheck has been run via zk linkcheck.

[mm-zk]

LGTM - but please revert the change in contracts (the code should work without it, right?)

[github-actions[bot]]

No performance difference detected (anymore)