Update changelog [skip ci]

CHANGES.md

@@ -10,6 +10,15 @@ creating a new release entry be sure to copy & paste the span tag with the
 `actions:bind` attribute, which is used by a regex to find the text to be
 updated. Only the first match gets replaced, so it's fine to leave the old
 ones in. -->
+-------------------------------------------------------------------------------
+## __cylc-ui-2.3.0 (<span actions:bind='release-date'>Upcoming</span>)__
+
+### Fixes
+
+[#1643](https://github.com/cylc/cylc-ui/pull/1643) -
+Fix bug where the up/down/home/end keys would not work inside the Edit Runtime
+form inputs.
+
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 ## __cylc-ui-2.3.0 (<span actions:bind='release-date'>Released 2023-11-28</span>)__