Update CHANGELOG

This will probably have to be updated when the actual pull request number is
set.

Author: BrianLMatthews

CHANGELOG.md

@@ -1,7 +1,11 @@
-### 0.8.6 (Next)
+### 0.8.7 (Next)
 
 * Your contribution here.
 
+### 0.8.6 (2024/08/07)
+
+* [#256](https://github.com/mongoid/mongoid-history/pull/256): Add track_blank_changes option - [@BrianLMatthews](https://github.com/BrianLMatthews).
+
 ### 0.8.5 (2021/09/18)
 
 * [#250](https://github.com/mongoid/mongoid-history/pull/250): Migrate to Github actions - [@johnnyshields](https://github.com/johnnyshields).