动作参数问题

File: [/zh_CN/rule/backend_influxdb.md](https://docs.emqx.cn/enterprise/latest/rule/backend_influxdb.html)
其中配置动作参数中的KEY和VALUE不清楚Value配置方法
没有例程不懂填写什么信息

Start with zh_CN/rule/backend_influxdb.md and inspect the action-parameter section where KEY and VALUE are described. Clarify how each value should be filled by adding a concrete example, then verify the rendered documentation page and its formatting.

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