Fill in release date for 6.4 final

CHANGELOG.txt

@@ -7,7 +7,7 @@ Changelog
  * Docs: Add missing `django.contrib.admin` to list of apps in "add to Django project" guide (Mohamed Rabiaa)
 
 
-6.4 (xx.xx.xxxx) - IN DEVELOPMENT
+6.4 (03.02.2025)
 ~~~~~~~~~~~~~~~~
 
  * Support for background tasks using `django-tasks` (Jake Howard)

docs/releases/6.4.md

@@ -1,6 +1,6 @@
-# Wagtail 6.4 release notes - IN DEVELOPMENT
+# Wagtail 6.4 release notes
 
-_Unreleased_
+_February 3, 2025_
 
 ```{contents}
 ---