Update CHANGELOG

Author: bouwew

CHANGELOG.md

@@ -2,7 +2,7 @@
 
 ## Ongoing
 
-- PR [](): Catch error from Issue [#312]()
+- PR [321](https://github.com/plugwise/python-plugwise-usb/pull/321): Catch error reported in Issue [#312](https://github.com/plugwise/plugwise_usb-beta/issues/312)
 - PR [319](https://github.com/plugwise/python-plugwise-usb/pull/319): Replace unclear warning message when a node is not online, also various small improvements suggested by CRAI.
 - PR [312](https://github.com/plugwise/python-plugwise-usb/pull/312): properly propagate configuration changes and initialize to available on first node wakeup