Add create_personal_snippet_spec back to smoke suite

As flaky issues were resolved

qa/qa/specs/features/browser_ui/3_create/snippet/create_personal_snippet_spec.rb

 # frozen_string_literal: true
 
 module QA
-  RSpec.describe 'Create' do # convert back to a smoke test once proved to be stable
+  RSpec.describe 'Create', :smoke do
     describe 'Personal snippet creation' do
       let(:snippet) do
         Resource::Snippet.fabricate_via_browser_ui! do |snippet|