Change default value, already generated a new token and discard the old one.

Change-Id: I5a536b2ebcd286dd6a8b93ef4e69be136f6ac00c
diff --git a/apps/dbuf/values.yaml b/apps/dbuf/values.yaml
index 2fb3a64..792f970 100644
--- a/apps/dbuf/values.yaml
+++ b/apps/dbuf/values.yaml
@@ -5,10 +5,11 @@
   repository: registry.aetherproject.org/tost/dbuf
   pullPolicy: Always
   tag: "latest"
-  credentials:
-    registry: "registry.aetherproject.org"
-    username: "aether_jenkins"
-    password: "9zySeOpTL"
+  credentials: {}
+  # If specified, use this credential to access the image
+  #   registry:
+  #   username:
+  #   password:
 
 extraParams:
   - '"-max_queues=1024"'