Upgrade to WP6.4.2

Changes

Update default WordPress version to 6.4.2

Update existing install

• Start by checking if you have a custom version declared in your .wp-env.override.json file !
  If you do, you can either remove or update it.
• Restart your local environment:
  > npm run env:start
• WordPress will update itself by reading the updated default configuration value core in .wp-env.json
• Check your running version with:
  > npx wp-env run cli wp core version
• That's it :)