docs: add cephobjectrealm.spec.defaultrealm field to examples

Signed-off-by: Joshua Hoblitt <josh@hoblitt.com>

Documentation/Storage-Configuration/Object-Storage-RGW/ceph-object-multisite.md

@@ -354,6 +354,8 @@ kind: CephObjectRealm
 metadata:
   name: my-store
   namespace: rook-ceph # namespace:cluster
+spec:
+  defaultRealm: false
 ---
 apiVersion: ceph.rook.io/v1
 kind: CephObjectZoneGroup

Documentation/Storage-Configuration/Object-Storage-RGW/object-storage.md

@@ -754,6 +754,8 @@ kind: CephObjectRealm
 metadata:
   name: multi-instance-store
   namespace: rook-ceph # namespace:cluster
+spec:
+  defaultRealm: false
 ---
 apiVersion: ceph.rook.io/v1
 kind: CephObjectZoneGroup