Headscale: Configure Memberships sync API endpoint

Change-Id: Iab3264231cdb1c2efb6089e0c01c5e7367d228ca
diff --git a/core/installer/values-tmpl/headscale.cue b/core/installer/values-tmpl/headscale.cue
index fdbcb5a..fb146ed 100644
--- a/core/installer/values-tmpl/headscale.cue
+++ b/core/installer/values-tmpl/headscale.cue
@@ -85,7 +85,8 @@
 				api: {
 					port: 8585
 					ipSubnet: input.ipSubnet
-					self: "http://headscale-api.\(release.namespace).svc.cluster/sync-users"
+					self: "http://headscale-api.\(release.namespace).svc.cluster"
+					fetchUsersAddr: "http://memberships-api.\(global.namespacePrefix)core-auth-memberships.svc.cluster.local/api/users"
 					image: {
 						repository: images.api.fullName
 						tag: images.api.tag