Updated Sync WLED devices (UDP Notifier) (markdown)

Sync-WLED-devices-(UDP-Notifier).md

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+_Note: this page is now out of date, see updated functionality in the code ([udp.cpp](https://github.com/Aircoookie/WLED/blob/master/wled00/udp.cpp))_
+
 ### Usage
 
 The UDP notifier function of WLED makes it easy to sync multiple lights to the same color/effect, enabled by default.