Record the removing of dividers in CHANGELOG.md

We missed adding an entry into the CHANGELOG.md to document the changes
we made and why we had to make changes

opencrvs/opencrvs-core#7404

CHANGELOG.md

@@ -7,6 +7,7 @@
 - Remove `splitView` option from DOCUMENT_UPLOADER_WITH_OPTION field
 - New required sections preview & review added. Signature field definitions are now part of these two sections same as normal form fields.
 - Remove `inputFieldWidth` from Number type form field
+- Remove unnecessary UI dividers that add in various sections of the declaration forms(e.g the Death, Birth and Marriage forms) [#244](https://github.com/opencrvs/opencrvs-countryconfig/pull/244)
 
 ### Bug fixes