Fix admin account created by `mastodon:setup` not being auto-approved (#29379)

lib/tasks/mastodon.rake

@@ -544,6 +544,7 @@ namespace :mastodon do
           owner_role = UserRole.find_by(name: 'Owner')
           user = User.new(email: email, password: password, confirmed_at: Time.now.utc, account_attributes: { username: username }, bypass_invite_request_check: true, role: owner_role)
           user.save(validate: false)
+          user.approve!
 
           Setting.site_contact_username = username