Update data-flow.mdx

Co-authored-by: Mark Story <[email protected]>

Author: aldy505

develop-docs/self-hosted/data-flow.mdx

@@ -89,7 +89,7 @@ graph LR
 ### Event Processing Pipeline
 
 1. The `snuba-consumer` service consumes events from `events` topic and process them. After being written to clickhouse, snuba publishes error & transaction events to `post-process-forwarder`.
-2. The Sentry consumer that consumes `post-process-forwarder` topic process the events, and republish it to `kafka`.
+2. The Sentry `post-process-forwarder` consumer consumes messages and spawns a `post_process_group` task for each processed error & issue occurance.
 
 ### Web User Interface