Update configure-upgrade-etcd.md

Author: baiyutang

content/zh/docs/tasks/administer-cluster/configure-upgrade-etcd.md

@@ -16,7 +16,7 @@ content_type: task
 -->
 
 <!-- overview -->
-{{< glossary_definition term_id="etcd" length="all" prepend="etcd 是一个">}}
+{{< glossary_definition term_id="etcd" length="all" >}}