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/appservice-telegram.libsonnet b/app/matrix/lib/appservice-telegram.libsonnet
index 209e855..77eac1d 100644
--- a/app/matrix/lib/appservice-telegram.libsonnet
+++ b/app/matrix/lib/appservice-telegram.libsonnet
@@ -58,8 +58,8 @@
 
         dataVolume: kube.PersistentVolumeClaim("appservice-telegram-%s" % [name]) {
             metadata+: cfg.metadata,
-            storage: "10Gi",
-            storageClass: cfg.storageClassName,
+            storage:: "10Gi",
+            storageClass:: cfg.storageClassName,
         },
 
         bootstrapJob: if cfg.bootstrapJob then (kube.Job("appservice-telegram-%s-bootstrap" % [name]) {