fix: Name missing when email is collected via email hook (#6530)

- The name is not updated when the email is updated via the email collect message. This PR fixes that.

spec/controllers/api/v1/widget/messages_controller_spec.rb

@@ -138,6 +138,7 @@ RSpec.describe '/api/v1/widget/messages', type: :request do
         message.reload
         expect(message.submitted_email).to eq(email)
         expect(message.conversation.contact.email).to eq(email)
+        expect(message.conversation.contact.name).to eq(email.split('@')[0])
       end
     end