Change MSC name so its more obvious what it is at a glance.

proposals/4194-user-redaction.md

@@ -1,4 +1,4 @@
-# MSC4194: User redaction
+# MSC4194: Batch redaction of events by sender within a room (including soft failed events)
 
 Targeted attacks are a problem in Matrix. Typically throwaway users
 are used to target matrix rooms with abuse in the form of multiple