Update URL of "Arducam_Mega"

Author: ArduCAM

repositories.txt

@@ -5298,7 +5298,7 @@ https://github.com/jsware/able-buttons
 https://github.com/PBernalPolo/HX710
 https://github.com/Anrijs/Aranet4-ESP32
 https://github.com/dennis-ard/ArduCAM
-https://github.com/dennis-ard/Arducam_Mega
+https://github.com/ArduCAM/Arducam_Mega
 https://github.com/RLL-Blue-Dragon/OSS-EC_ADI_AD22103K_00000057
 https://github.com/RLL-Blue-Dragon/OSS-EC_MAXIM_MAX6607IXK_MAX6608IUK_00000057
 https://github.com/RLL-Blue-Dragon/OSS-EC_MICROCHIP_MCP9700_MCP9700A_00000057