Fill in release date for 4.1.3

CHANGELOG.txt

@@ -243,7 +243,7 @@ Changelog
  * Maintenance: Replace repeated HTML `avatar` component with a template tag include `{% avatar ... %}` throughout the admin interface (Aman Pandey)
 
 
-4.1.3 (xx.xx.xxxx) - IN DEVELOPMENT
+4.1.3 (13.03.2023)
 ~~~~~~~~~~~~~~~~~~
 
  * Fix: Add right-to-left (RTL) support for the following form components: Switch, Minimap, live preview (Thibaud Colas)

docs/releases/4.1.3.md

@@ -1,6 +1,6 @@
-# Wagtail 4.1.3 release notes - IN DEVELOPMENT
+# Wagtail 4.1.3 release notes
 
-_Unreleased_
+_March 13, 2023_
 
 ```{contents}
 ---