Note that JupyterHub requires Ingress

The JupyterHub app cannot be requires Ingress, but this was not noted
anywhere on the applications page -- the install button was simply
disabled.

See https://gitlab.com/gitlab-org/gitlab/-/issues/23539

app/assets/javascripts/clusters/components/applications.vue

@@ -467,6 +467,17 @@ export default {
                         notebooks to a class of students, a corporate data science group,
                         or a scientific research group.`)
             }}
+            <gl-sprintf
+              :message="
+                s__(
+                  'ClusterIntegration|%{boldStart}Note:%{boldEnd} Requires Ingress to be installed.',
+                )
+              "
+            >
+              <template #bold="{ content }">
+                <b>{{ content }}</b>
+              </template>
+            </gl-sprintf>
           </p>
 
           <template v-if="ingressExternalEndpoint">

locale/gitlab.pot

@@ -5684,6 +5684,9 @@ msgstr ""
 msgid "ClusterIntegration|%{appList} was successfully installed on your Kubernetes cluster"
 msgstr ""
 
+msgid "ClusterIntegration|%{boldStart}Note:%{boldEnd} Requires Ingress to be installed."
+msgstr ""
+
 msgid "ClusterIntegration|%{externalIp}.nip.io"
 msgstr ""