kube: clean up PersistentVolumeClaims

There's no difference as far as jsonnet is concerned, but it may confuse newbies, as Service and SimpleIngress use double colon for its top-level kube helpers. This also removes any ambiguity as to whether this is manifested in final JSON. So we can make that a convention.

Change-Id: I01ad4ea63f4d5d8ee6e5d41c79637ba186548c6f
Reviewed-on: https://gerrit.hackerspace.pl/c/hscloud/+/1803
Reviewed-by: q3k <q3k@hackerspace.pl>
diff --git a/app/matrix/lib/coturn.libsonnet b/app/matrix/lib/coturn.libsonnet
index e63a0bc..f1b127b 100644
--- a/app/matrix/lib/coturn.libsonnet
+++ b/app/matrix/lib/coturn.libsonnet
@@ -60,8 +60,8 @@
     },
 
     dataVolume: app.ns.Contain(kube.PersistentVolumeClaim("coturn-data")) {
-        storage: "10Gi",
-        storageClass: cfg.storageClassName,
+        storage:: "10Gi",
+        storageClass:: cfg.storageClassName,
     },
 
     deployment: app.ns.Contain(kube.Deployment("coturn")) {