Description

Bumping @metamask/keyring-controller to ^21.0.1

## [21.0.1]

### Fixed

- Fixed duplication of unsupported keyrings ([#5535](https://github.com/MetaMask/core/pull/5535))
- Enforce keyrings metadata alignment when unlocking existing vault ([#5535](https://github.com/MetaMask/core/pull/5535))
- Fixed frozen object mutation attempt when updating metadata ([#5535](https://github.com/MetaMask/core/pull/5535))

Related issues

Fixes: #31200

Manual testing steps

1. Start with an installation from before we introduced keyringsMetadata, proceed past onboarding so that you have a vault setup (e.g. v12.12.0)
2. Upgrade to this branch
3. Start the extension (without logging in)
4. Leave the window open a while to give it time to initialize all controllers
5. Reload the extension before unlocking
6. Try to unlock the wallet

Screenshots/Recordings

Before

After

Pre-merge author checklist

• I've followed MetaMask Contributor Docs and MetaMask Extension 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.