Fill in release date for 3.0.3

CHANGELOG.txt

@@ -210,7 +210,7 @@ Changelog
  * Fix: Remove outdated reference to Image.LoaderError (Matt Westcott)
 
 
-3.0.3 (xx.xx.xxxx) - IN DEVELOPMENT
+3.0.3 (05.09.2022)
 ~~~~~~~~~~~~~~~~~~
 
  * Fix: On the Locked Pages report, limit the "locked by" filter to just users who have locked pages (Stefan Hammer)

docs/releases/3.0.3.md

@@ -1,6 +1,6 @@
-# Wagtail 3.0.3 release notes - IN DEVELOPMENT
+# Wagtail 3.0.3 release notes
 
-_Unreleased_
+_September 5, 2022_
 
 ```{contents}
 ---