Fill in release date for 6.1.1

CHANGELOG.txt

@@ -20,7 +20,7 @@ Changelog
  * Maintenance: Exclude the `client/scss` directory in Tailwind content config to speed up CSS compilation (Sage Abdullah)
 
 
-6.1.1 (xx.xx.xxxx) - IN DEVELOPMENT
+6.1.1 (21.05.2024)
 ~~~~~~~~~~~~~~~~~~
 
  * Fix: Fix form action URL in user edit and delete views for custom user models (Sage Abdullah)

docs/releases/6.1.1.md

@@ -1,6 +1,6 @@
-# Wagtail 6.1.1 release notes - IN DEVELOPMENT
+# Wagtail 6.1.1 release notes
 
-_Unreleased_
+_May 21, 2024_
 
 ```{contents}
 ---