Fix wording in Add Cluster tooltip

ee/app/views/projects/ee/clusters/_buttons.html.haml

@@ -2,4 +2,4 @@
   - if project.feature_available?(:multiple_clusters)
     = link_to s_("ClusterIntegration|Add cluster"), new_project_cluster_path(project), class: "btn btn-success btn-add-cluster has-tooltip js-add-cluster"
   - else
-    = link_to s_("ClusterIntegration|Add cluster"), new_project_cluster_path(project), class: "btn btn-success btn-add-cluster disabled has-tooltip js-add-cluster", title: s_("ClusterIntegration|Multiple clusters are available in GitLab Entreprise Edition Premium and Ultimate")
+    = link_to s_("ClusterIntegration|Add cluster"), new_project_cluster_path(project), class: "btn btn-success btn-add-cluster disabled has-tooltip js-add-cluster", title: s_("ClusterIntegration|Multiple clusters are available in GitLab Enterprise Edition Premium and Ultimate")

locale/gitlab.pot

@@ -680,7 +680,7 @@ msgstr ""
 msgid "ClusterIntegration|Manage your cluster by visiting %{link_gke}"
 msgstr ""
 
-msgid "ClusterIntegration|Multiple clusters are available in GitLab Entreprise Edition Premium and Ultimate"
+msgid "ClusterIntegration|Multiple clusters are available in GitLab Enterprise Edition Premium and Ultimate"
 msgstr ""
 
 msgid "ClusterIntegration|Note:"