feat: Updated the design of the article page (#8166)

Co-authored-by: Muhsin Keloth <muhsinkeramam@gmail.com>
Co-authored-by: Pranav Raj S <pranav@chatwoot.com>

spec/helpers/portal_helper_spec.rb

@@ -119,7 +119,7 @@ describe PortalHelper do
       end
     end
   end
- 
+
   describe '#render_category_content' do
     let(:markdown_content) { 'This is a *test* markdown content' }
     let(:plain_text_content) { 'This is a test markdown content' }