Update URL of "UNIT_ENV"

#287

Author: per1234

registry.txt

@@ -4193,7 +4193,7 @@ https://github.com/dattasaurabh82/TinyMegaI2C.git|Contributed|TinyMegaI2C
 https://github.com/dattasaurabh82/RV8803Tiny.git|Contributed|RV8803Tiny
 https://github.com/stm32duino/X-NUCLEO-IHM01A1.git|Contributed|STM32duino X-NUCLEO-IHM01A1
 https://github.com/m5stack/UNIT_4RELAY.git|Contributed|UNIT_4RELAY
-https://github.com/m5stack/UNIT_ENV_III.git|Contributed|UNIT_ENV
+https://github.com/m5stack/UNIT_ENV.git|Contributed|UNIT_ENV
 https://github.com/m5stack/ATOM_DTU_NB.git|Contributed|ATOM_DTU_NB
 https://github.com/m5stack/ATOM_DTU_LoRaWAN.git|Contributed|ATOM_DTU_LoRaWAN
 https://github.com/Guswib/Potentiostat_Shield.git|Contributed|Potentiostat_Shield