Update author link in diff-delete RFD (#1111)

Author: rohitpaulk

docs/rfds/diff-delete.mdx

@@ -2,7 +2,7 @@
 title: "Represent deleted files in diff"
 ---
 
-Author(s): [anna239](https://github.com/benbrandt)
+Author(s): [anna239](https://github.com/anna239)
 
 ## Elevator pitch