InfluxDB v2.x Input Plugin - wrong Plugin ID?

_Describe the issue here._
This is regarding the difference between the InfluxDB v1.x and v2.x input plugins.

It's slightly confusing that for the InfluxDB v2.x input plugin entry, it's states there no input plugin (which is correct, it's the prometheus plugin. But then the plugin ID is `inputs.influxdb` - the same same v1.x.

I had a user who recently was attempting to add the `inputs.influxdb` plugin for v2.x based on this. If my understanding is correct, I believe the plugin ID should be `inputs.prometheus` instead.

See screen shot attached.

https://docs.influxdata.com/telegraf/v1.22/plugins/#input-influxdb

##### Relevant URLs
- https://docs.influxdata.com/telegraf/v1.22/plugins/
- _Provide other relevant URLs (project issues, community threads, etc.)_

Start with the linked Telegraf plugins documentation and compare the InfluxDB v1.x and v2.x entries, using the issue screenshot and description as the expected behavior. Locate the page containing the v2.x entry and update its plugin ID if the entry represents the Prometheus plugin; done means the displayed ID no longer directs users to inputs.influxdb incorrectly.

Written by the indexing model from the issue text.