Add submission # 7276

#7276

Author: ArduinoBot

registry.txt

@@ -8597,3 +8597,4 @@ https://github.com/pdoebler/HS300x.git|Contributed|HS300x
 https://github.com/hii-nice-2-meet-u/TINY.git|Contributed|tiny
 https://github.com/m5stack/M5Chain.git|Contributed|M5Chain
 https://github.com/hii-nice-2-meet-u/LUMINOUS.git|Contributed|luminous
+https://github.com/sfera-labs/iono.git|Contributed|Iono Uno-MKR-RP