Update emqx-plugin-templates/priv/config_i18n.json.example

Co-authored-by: zmstone <[email protected]>

Author: savonarola

emqx-plugin-templates/priv/config_i18n.json.example

@@ -5,7 +5,7 @@
   },
   "$client_regex_desc": {
     "zh": "一个正则表达式，用于验证客户端ID。",
-    "en": "The client regex is a regex used to validate the clientid."
+    "en": "A regex used to validate the clientid."
   },
   "$hostname_label": {
     "zh": "主机名",