feat(content): remove onBatch limitation as no longer valid

Author: JasonSooter

src/connections/functions/insert-functions.md

@@ -61,16 +61,14 @@ The default source code template includes handlers for all event types. You don'
 
 Insert functions can define handlers for each message type in the [Segment spec](/docs/connections/spec/):
 
-> info "onBatch handler"
-> At this time, Destination Insert Functions do not support the onBatch handler. 
-
 - `onIdentify`
 - `onTrack`
 - `onPage`
 - `onScreen`
 - `onGroup`
 - `onAlias`
 - `onDelete`
+- `onBatch`
 
 Each of the functions above accepts two arguments: