Fix a typo in CHANGELOG.md

Fixes #147

Author: dkhalanskyjb

CHANGELOG.md

@@ -8,7 +8,7 @@
 
 #### Changes
 
-- `ZoneOffset` was replaced by two other classes: `FixedOffsetDateTime`, which represents a time zone with a fixed offset, and `UtcOffset`, which represents just the UTC offset ([PR#125](https://github.com/Kotlin/kotlinx-datetime/pull/125)).
+- `ZoneOffset` was replaced by two other classes: `FixedOffsetTimeZone`, which represents a time zone with a fixed offset, and `UtcOffset`, which represents just the UTC offset ([PR#125](https://github.com/Kotlin/kotlinx-datetime/pull/125)).
 - The `DayBased` and `MonthBased` subclasses of `DateTimeUnit.DateBased` are now accessed as `DateTimeUnit.DayBased` and `DateTimeUnit.MonthBased` as opposed to `DateTimeUnit.DateBased.DayBased` and `DateTimeUnit.DateBased.MonthBased` respectively ([PR#131](https://github.com/Kotlin/kotlinx-datetime/pull/131)).
 
 ## 0.2.1