Merge pull request #1550 from nhsuk/DomBaker-patch-1

Update CHANGELOG.md

Author: sarawilcox

CHANGELOG.md

@@ -1,6 +1,6 @@
 # NHS digital service manual Changelog
 
-## TBC — 15 October 2021
+## 5.4.0 — 19 October 2021
 
 :new: **New features**
 
@@ -10,7 +10,6 @@
 
 - Change case of word "or" in "none" option for checkboxes
 
-
 ## 5.3.0 - 30 September 2021
 
 :new: **New features**