Update proposals/3925-replace-aggregation-with-full-event.md

Co-authored-by: Jonas Platte <[email protected]>
Signed-off-by: benkuly <[email protected]>

proposals/3925-replace-aggregation-with-full-event.md

@@ -1,7 +1,7 @@
 # MSC3925: m.replace aggregation with full event
 
 The Matrix DAG has immutable PDUs forming an auth chain. The client representation of this PDUs are simply called events.
-While this events also have been immutable until v1.3, since v1.4 they aren't.
+While these events also have been immutable until v1.3, since v1.4 they aren't.
 When a client sends a `m.replace` relation, [the server should replace the content of the original event](https://spec.matrix.org/v1.4/client-server-api/#server-side-replacement-of-content).
 
 There are some issues with this requirement: