docs(influxdb): add a node to the write_syntax config

lib-ee/emqx_ee_bridge/i18n/emqx_ee_bridge_influxdb.conf

@@ -22,14 +22,16 @@ See also [InfluxDB 2.3 Line Protocol](https://docs.influxdata.com/influxdb/v2.3/
 TLDR:</br>
 ```
 <measurement>[,<tag_key>=<tag_value>[,<tag_key>=<tag_value>]] <field_key>=<field_value>[,<field_key>=<field_value>] [<timestamp>]
-```"""
+```
+Please note that a placeholder for an integer value must be annotated with a suffix `i`. For example `${payload.int_value}i`."""
             zh: """使用 InfluxDB API Line Protocol 写入 InfluxDB 的数据，支持占位符</br>
 参考 [InfluxDB 2.3 Line Protocol](https://docs.influxdata.com/influxdb/v2.3/reference/syntax/line-protocol/) 及
 [InfluxDB 1.8 Line Protocol](https://docs.influxdata.com/influxdb/v1.8/write_protocols/line_protocol_tutorial/) </br>
 TLDR: </br>
 ```
 <measurement>[,<tag_key>=<tag_value>[,<tag_key>=<tag_value>]] <field_key>=<field_value>[,<field_key>=<field_value>] [<timestamp>]
-```"""
+```
+注意，整形数值占位符后需要添加一个字符 `i` 类型标识。例如 `${payload.int_value}i`"""
             }
         label {
             en: "Write Syntax"