remove duplicate bug-fix sections in changelog.

Author: aesmail

CHANGELOG.md

@@ -5,9 +5,6 @@
 - Clicking on the "Select all" checkbox and performing an action wasn't working properly (#129).
 - A resource with a `{:array, _}` field type used to crash when rendering the form page (#130).
 - Tidbit icons weren't shown properly.
-
-#### Bug Fixes
-
 - Schemas with `has_many` or `many_to_many` assocations crashed when trying to save if the schema doesn't have a default `changeset/2` function.
 
 ### v0.9.0 (2020-07-02)