Add ZKsync Era network support.

[bgravenorst]

Description

ZKsync Era is now supported by the Infura service.

Issue(s) fixed

1371

Preview

Checklist

Complete this checklist before merging your PR:

• [x] If this PR contains a major change to the documentation content, I have added an entry to the top of the "What's new?" page.
• [x] The proposed changes have been reviewed and approved by a member of the documentation team.

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Name	Status	Preview	Comments	Updated (UTC)
metamask-docs	✅ Ready (Inspect)	Visit Preview	💬 Add feedback	Jul 1, 2024 7:20pm

[socket-security[bot]]

No dependency changes detected. Learn more about Socket for GitHub ↗︎

👍 No dependency changes detected in pull request

[joaniefromtheblock]

Added changes/suggestions from this PR

[joaniefromtheblock]

Need to add update specified in chat and include another mention to Services docs in the What's New section