Update expected description in enable_sast_from_configuration_spec.rb

qa/qa/specs/features/ee/browser_ui/secure/enable_sast_from_configuration_spec.rb

@@ -7,7 +7,7 @@ module QA
     describe 'Enable SAST from UI' do
       let(:merge_request_description) do
         <<~DESCRIPTION.tr("\n", ' ').strip
-          Set .gitlab-ci.yml to enable or configure SAST security scanning using the GitLab managed template. You can
+          Configure SAST in `.gitlab-ci.yml` using the GitLab managed template. You can
           [add variable overrides](https://docs.gitlab.com/ee/user/application_security/sast/#customizing-the-sast-settings)
           to customize SAST settings.
         DESCRIPTION