Fill in release date for 6.3.3

CHANGELOG.txt

@@ -1,7 +1,7 @@
 Changelog
 =========
 
-6.3.3 (xx.xx.xxxx) - IN DEVELOPMENT
+6.3.3 (03.02.2025)
 ~~~~~~~~~~~~~~~~~~
 
  * Fix: Correctly place comment buttons next to date / datetime / time fields. (Srishti Jaiswal)

docs/releases/6.3.3.md

@@ -1,6 +1,6 @@
-# Wagtail 6.3.3 release notes - IN DEVELOPMENT
+# Wagtail 6.3.3 release notes
 
-_Unreleased_
+_February 3, 2025_
 
 ```{contents}
 ---