Add default namespace default to ServiceAccount definition, to catc…

…h case where users find-replace `default` with another namespace but don't change it for the ServiceAccount

Signed-Off-By: Andrew Taylor <abc@abctaylor.com>

README.md

@@ -118,6 +118,7 @@ apiVersion: v1
 kind: ServiceAccount
 metadata:
   name: goldpinger-serviceaccount
+  namespace: default
 ---
 apiVersion: apps/v1
 kind: DaemonSet