chore: upgrading auto-changelog dependency

[georgewrmarshall]

Description

Updates the @metamask/auto-changelog dependency from v3.4.4 to v4.1.0 across the design system packages. This update includes several breaking changes and new features:

Key changes in v4.1.0:

• Added --autoCategorize flag for automatic commit categorization
• Breaking changes from v4.0.0:
  • Dropped support for Node.js <18.18
  • Requires prettier@>=3.0.0 as peer dependency
  • Enables Prettier formatting by default

Related issues

Fixes: #378

Manual testing steps

1. Run yarn changelog:update command to verify it works with the new version
2. Verify changelog formatting is correct with the new Prettier defaults
3. Verify Node.js version compatibility (requires >=18.18)

Screenshots/Recordings

Changelog commands still work

changelog.after.mov

Pre-merge author checklist

• I've followed MetaMask Contributor Docs
• I've completed the PR template
• I've applied appropriate labels (dependencies, javascript)

Pre-merge reviewer checklist

• I've manually tested the PR
• I confirm this PR addresses all acceptance criteria

Note: This PR was previously blocked by other dependency upgrades that needed to be resolved first. Those have now been addressed, making this upgrade possible.