Update CHANGES.md

CHANGES.md

@@ -11,6 +11,13 @@ creating a new release entry be sure to copy & paste the span tag with the
 updated. Only the first match gets replaced, so it's fine to leave the old
 ones in. -->
 
+-------------------------------------------------------------------------------
+## __cylc-uiserver-1.4.0 (<span actions:bind='release-date'>Upcoming</span>)__
+
+[#455](https://github.com/cylc/cylc-uiserver/pull/455)- Added a specific
+warning for cases where workflow needs upgrade, and an upgrade toggle in
+cylc play dialog.
+
 -------------------------------------------------------------------------------
 ## __cylc-uiserver-1.3.0 (<span actions:bind='release-date'>Upcoming</span>)__
 
@@ -21,10 +28,6 @@ ones in. -->
 [#463](https://github.com/cylc/cylc-uiserver/pull/463) - Fixed failure to
 connect to workflows when they were restarted.
 
-[#455](https://github.com/cylc/cylc-uiserver/pull/455)- Added a specific
-warning for cases where workflow needs upgrade, and an upgrade toggle in
-cylc play dialog.
-
 -------------------------------------------------------------------------------
 ## __cylc-uiserver-1.2.2 (<span actions:bind='release-date'>Released 2023-04-28</span>)__