Update observability.md

Author: forstisabella

src/connections/reverse-etl/observability.md

@@ -20,7 +20,7 @@ To check the status of your extractions:
 5. If your sync failed, click the failed reason to get more details on the error and view sample payloads to help troubleshoot the issue.
 
 > info "Segment automatically retries events that were extracted but failed to load"
-> Segment retries events for 14 days following a total or partial sync failure. Before loading the failed records on a subsequent sync, Segment checks for the latest changes in your data to ensure the data loaded into your warehouse isn't stale.  
+> Segment retries events for 14 days following a total or partial sync failure. Before loading the failed records on a subsequent sync, Segment checks for the latest changes in your data to ensure the data loaded into your warehouse isn't stale. If the error causing the load failure is coming from an upstream tool, you can fix the error in the upstream tool to ensure the record loads on the next sync.  
 
 ## Email alerts
 You can opt in to receive email alerts regarding notifications for Reverse ETL.