docs(changelog): Add note about added test case for vMerge default value

Author: SpraxDev

docs/changes/1.x/1.4.0.md

@@ -15,5 +15,6 @@
 ### Miscellaneous
 
 - Bump dompdf/dompdf from 2.0.4 to 3.0.0 by [@dependabot](https://github.com/dependabot) fixing [#2621](https://github.com/PHPOffice/PHPWord/issues/2621) in [#2666](https://github.com/PHPOffice/PHPWord/pull/2666)
+- Add test case to make sure vMerge defaults to 'continue' by [@SpraxDev](https://github.com/SpraxDev) in [#2677](https://github.com/PHPOffice/PHPWord/pull/2677)
 
 ### BC Breaks