Merge pull request #6416 from influxdata/jts/fix-telegraf-aggregator-typo-intro

fix(telegraf): Aggregator typo and intro

Author: jstirnaman

telegraf-build/templates/aggregator_index.tmpl

@@ -1,6 +1,6 @@
 ---
 title: "Telegraf Aggregator Plugins"
-description: "Telegraf aggregator plugins aggregator data across multiple metrics."
+description: "Telegraf aggregator plugins aggregate data across multiple metrics."
 menu:
   telegraf_v1_ref:
     name: Aggregator plugins
@@ -10,7 +10,7 @@ menu:
 tags: [aggregator-plugins]
 ---
 
-Telegraf aggregator plugins aggregator data across multiple metrics using e.g.
-statistical functions like min, max or mean.
+Telegraf aggregator plugins aggregate data across multiple metrics.
+Aggregator plugins create aggregate metrics--for example, by implementing statistical functions such as mean, min, and max.
 
 {{`{{< telegraf/plugins type="aggregator" >}}`}}