chore(CHANGELOG): update formatting

CHANGELOG.md

@@ -6,7 +6,7 @@ All notable changes to [bpmn-js-i18n](https://github.com/bpmn-io/bpmn-js-i18n) a
 
 ___Note:__ Yet to be released changes appear here._
 
-# 2.0.0
+## 2.0.0
 
 _Adapts to bpmn-js version scheme, and re-publishes `v1.3.0` changes._
 
@@ -18,20 +18,20 @@ _Adapts to bpmn-js version scheme, and re-publishes `v1.3.0` changes._
 * Labels changed from title case to sentence case
 * Non-core bpmn-js translation strings removed
 
-# 1.3.1
+## 1.3.1
 
 _Reverts 1.3.0 breaking changes._
 
-# 1.3.0
+## 1.3.0
 
 * `FEAT`: update translations according to `bpmn-js@16` ([#27](https://github.com/bpmn-io/bpmn-js-i18n/pull/27))
 * `DEPS`: add bpmn-js peer dependency
 
-# 1.2.0
+## 1.2.0
 
 * `FEAT`: translate _Append TextAnnotation_ to English and Russian ([#25](https://github.com/bpmn-io/bpmn-js-i18n/pull/25))
 
-# 1.1.1
+## 1.1.1
 
 * `FIX`: correct typos in [Russian locale](/translations/ru.js)