Update add kubernetes cluster qa selector

app/views/clusters/clusters/_empty_state.html.haml

@@ -11,4 +11,4 @@
 
       - if clusterable.can_add_cluster?
         .gl-text-center
-          = link_to s_('ClusterIntegration|Integrate with a cluster certificate'), clusterable.new_path, class: 'gl-button btn btn-success'
+          = link_to s_('ClusterIntegration|Integrate with a cluster certificate'), clusterable.new_path, class: 'gl-button btn btn-success', data: { qa_selector: 'add_kubernetes_cluster_link' }

qa/qa/page/project/operations/kubernetes/index.rb

@@ -7,11 +7,11 @@ module QA
         module Kubernetes
           class Index < Page::Base
             view 'app/views/clusters/clusters/_empty_state.html.haml' do
-              element :add_kubernetes_cluster_button, "link_to s_('ClusterIntegration|Integrate with a cluster certificate')" # rubocop:disable QA/ElementWithPattern
+              element :add_kubernetes_cluster_link
             end
 
             def add_kubernetes_cluster
-              click_on 'Connect cluster with certificate'
+              click_element :add_kubernetes_cluster_link
             end
 
             def has_cluster?(cluster)