Update data-flow.mdx

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

Author: aldy505

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

@@ -88,7 +88,7 @@ graph LR
 
 ### Event Processing Pipeline
 
-1. The `snuba-consumer` service consumes events from `events` topic and process them. Some are being republished to `post-process-forwarder` topic in `kafka`. Others are being written to `clickhouse`.
+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`.
 
 ### Web User Interface