fix: update zksync titles to match era as being 1 chain in the elastic chain and new branding

[zk-Lumi]

Description

• Fixes importantly Era naming in frontend - Era != ZKsync, its one chain in the elastic vision
• Fixes spelling of zkSync to ZKsync per new branding

Related issues

Fixes: ZKsync & Era naming

Made similar pr to browser extension: MetaMask/metamask-extension#29219

Manual testing steps

1. Go to suggested networks

Screenshots/Recordings

Before

After

Pre-merge author checklist

• I’ve followed MetaMask Contributor Docs and MetaMask Mobile Coding Standards.
• I've completed the PR template to the best of my ability
• I’ve included tests if applicable
• I’ve documented my code using JSDoc format if applicable
• I’ve applied the right labels on the PR (see labeling guidelines). Not required for external contributors.

Pre-merge reviewer checklist

• I've manually tested the PR (e.g. pull and build branch, run the app, test code being changed).
• I confirm that this PR addresses all acceptance criteria described in the ticket it closes and includes the necessary testing evidence such as recordings and or screenshots.

[github-actions]

CLA Signature Action: All authors have signed the CLA. You may need to manually re-run the blocking PR check if it doesn't pass in a few minutes.