Add changelog for #9785

CHANGELOG.txt

@@ -105,6 +105,7 @@ Changelog
  * Maintenance: Use util method to construct dummy requests in tests (Jake Howard)
  * Maintenance: Remove unused dev-only react-axe integration (Thibaud Colas)
  * Maintenance: Migrate accessible Skip Link implementation to a Stimulus controller (Loveth Omokaro)
+ * Maintenance: Split up `wagtail.admin.panels` into submodules, existing exports have been preserved (Matt Westcott)
 
 
 4.1.2 (xx.xx.xxxx) - IN DEVELOPMENT

docs/releases/4.2.md

@@ -136,6 +136,7 @@ This feature was developed by Jake Howard.
  * Use util method to construct dummy requests in tests (Jake Howard)
  * Remove unused dev-only react-axe integration (Thibaud Colas)
  * Migrate accessible Skip Link implementation to a Stimulus controller (Loveth Omokaro)
+ * Split up `wagtail.admin.panels` into submodules, existing exports have been preserved (Matt Westcott)
 
 ## Upgrade considerations