Update changelog language.

Fizzadar · anoadragon453 · web-flow · commit 1d9ea275f524 · 2021-10-29T13:09:29.000+01:00
Co-authored-by: Andrew Morgan &lt;1342360+anoadragon453@users.noreply.github.com&gt;
diff --git a/changelog.d/11207.bugfix b/changelog.d/11207.bugfix
@@ -1 +1 @@
-Linearize appservice ephemeral event handling, fixing serialization errors. Contributed by @Fizzadar at Beeper.
+Fix a long-standing bug which could result in serialization errors and potentially duplicate transaction data when sending ephemeral events to application services. Contributed by @Fizzadar at Beeper.

Original file line number	Diff line number	Diff line change
`@@ -1 +1 @@`
`1`		`-Linearize appservice ephemeral event handling, fixing serialization errors. Contributed by @Fizzadar at Beeper.`
	`1`	`+Fix a long-standing bug which could result in serialization errors and potentially duplicate transaction data when sending ephemeral events to application services. Contributed by @Fizzadar at Beeper.`