Merge pull request #2190 from per1234/move-Excelsior

Update URL of "Excelsior"

Author: umbynos

registry.txt

@@ -4311,7 +4311,7 @@ https://github.com/DFRobot/DFRobot_BMP3XX.git|Contributed|DFRobot_BMP3XX
 https://github.com/terrorsl/sMQTTBroker.git|Contributed|sMQTTBroker
 https://github.com/FeralAI/MPG.git|Contributed|MPG
 https://github.com/winner10920/ESPSerialFlasher.git|Contributed|ESPSerialFlasher
-https://github.com/Frederik-Eberhard/Excelsior.git|Contributed|Excelsior
+https://github.com/Excelsior-Robotics/Excelsior.git|Contributed|Excelsior
 https://github.com/khoih-prog/ESP32_PWM.git|Contributed|ESP32_PWM
 https://github.com/tamctec/ft62x6-arduino.git|Contributed|TAMC_FT62X6
 https://github.com/Phoenix1747/MQ135.git|Contributed|MQ135