Feature: As a admin, I should be able to add webhooks to account (#572)

Co-authored-by: Pranav Raj S <pranavrajs@gmail.com>

spec/factories/webhooks.rb

@@ -2,6 +2,6 @@ FactoryBot.define do
   factory :webhook do
     account_id { 1 }
     inbox_id { 1 }
-    url { 'MyString' }
+    url { 'https://api.chatwoot.com' }
   end
 end