chore: Fix rubococop failures (#7130)

- fixes rubocop failures on develop

spec/controllers/public/api/v1/inbox/conversations_controller_spec.rb

@@ -27,11 +27,11 @@ RSpec.describe 'Public Inbox Contact Conversations API', type: :request do
       get "/public/api/v1/inboxes/#{api_channel.identifier}/contacts/#{contact_inbox.source_id}/conversations"
 
       expect(response).to have_http_status(:success)
-      data = JSON.parse(response.body)
+      data = response.parsed_body
       expect(data.length).to eq 1
       expect(data.first['messages'].length).to eq 2
-      expect(data.first['messages'].map { |m| m['content'] }).not_to include('private-message-1')
-      expect(data.first['messages'].map { |m| m['message_type'] }).not_to include('activity')
+      expect(data.first['messages'].pluck('content')).not_to include('private-message-1')
+      expect(data.first['messages'].pluck('message_type')).not_to include('activity')
     end
   end