[flutter_local_notifications] fixed 18.0.1 changelog (#2452)

* fixed 18.0.1 changelog

* minor amendment to put placeholder on patch version

flutter_local_notifications/CHANGELOG.md

@@ -1,7 +1,6 @@
 ## [18.0.1]
 
-* Added upper bound constraints for [timezone](https://pub.dev/packages/timezone) dependency. Future releases may bump the minimum `timezone` dependency but this approach is being used at the moment as version 0.10.0 of the time `timezone` package introduces a dependency on `http` package. Directly bumping the `flutter_local_notifications` dependency on `timezone` could have introduced dependency conflicts
-* Bumped `http` dependency in example app
+* Added upper bound constraints for [timezone](https://pub.dev/packages/timezone) dependency. This is to allow the plugin and apps pull version 0.10.x if constraints are satisified. Future releases may bump the minimum `timezone` dependency but this approach is being used at the moment as version 0.10.0 of the time `timezone` package introduces a dependency on `http` package. Directly bumping the `flutter_local_notifications` dependency on `timezone` could have introduced dependency conflicts
 
 ## [18.0.0]