Re add line

Author: tobias-wilfert

develop-docs/backend/application-domains/transaction-clustering/index.mdx

@@ -7,6 +7,7 @@ Sentry attempts to scrub high-cardinality identifiers from URL transactions
 to aggregate performance data and provide more valuable insights.
 
 In terms of user experience, this feature plays a similar role as [Issue Grouping](/backend/grouping/).
+In terms of technical implementation, it is similar to [Data Scrubbing](/backend/pii/).
 
 ## The Problem