Update RELEASE-NOTES.md

JeroenDeDauw · web-flow · commit 5a45e1392a3f · 2019-06-06T04:41:26.000+02:00
diff --git a/RELEASE-NOTES.md b/RELEASE-NOTES.md
@@ -4,7 +4,7 @@
 
 * `TermList` now throws `InvalidArgumentException` when given non-iterable rather than failing silently
 * `SiteLinkList` now throws `InvalidArgumentException` when given non-iterable rather than failing silently
-* Slightly optimized `EntityId::isForeign()` by using `$this->repositoryName` instead of `$this->serialization`
+* Slightly optimized `EntityId::isForeign`
 
 ## Version 9.1.0 (2019-01-24)
 
