Add submission # 6263

#6263

Author: ArduinoBot

registry.txt

@@ -8103,3 +8103,4 @@ https://github.com/whchun/waveshare-epd.git|Contributed|Waveshare_EPD
 https://github.com/Johboh/GCMEncryption.git|Contributed|GCMEncryption
 https://github.com/leofig-rj/Arduino-LF_LoRa.git|Contributed|LF_LoRa
 https://github.com/Johboh/ieee-802_15_4.git|Contributed|ieee-802_15_4
+https://github.com/Johboh/ieee-802_15_4-network-shared.git|Contributed|ieee-802_15_4-network-shared