Update repositories.txt (#2509)

Marthaarman · web-flow · commit 4ce85c5bbb87 · 2023-02-25T14:18:25.000Z
Add a new library that allows an arduino (mini) to both transmit and receive DMX using the max485 ttl board.
diff --git a/repositories.txt b/repositories.txt
@@ -5601,3 +5601,4 @@ https://github.com/chandrawi/ADE7753
 https://github.com/gobbolab/room-weather
 https://github.com/fredlarochelle/RunningStats
 https://github.com/triqadafi/TQDF_WatchOS
+https://github.com/Marthaarman/dmx-transceiver
