Correct repository URL for "QuickESPNow"

The URL must be for the repository root. Previously, the URL was for a GitHub website subpage, and thus caused the validation check to fail:

> A problem was found with your submission https://github.com/Hyperion-Robotics/QuickESPNow/tree/main
>
> ❌ ERROR: Submission URL is not a Git clone URL (e.g., `https://github.com/arduino-libraries/Servo`).

Author: per1234

repositories.txt

@@ -76,7 +76,7 @@ https://github.com/VanSilver/LCD595
 https://github.com/biomurph/GrayCode
 https://github.com/arielzw/DPS-Power-Supply
 https://github.com/cheerlights/cheerlights-arduino-library
-https://github.com/Hyperion-Robotics/QuickESPNow/tree/main
+https://github.com/Hyperion-Robotics/QuickESPNow
 https://github.com/jjlondonoc/AFE4950-Arduino-Library
 https://github.com/jjlondonoc/MCP4132-Arduino-Library
 https://github.com/MiguelLoureiro98/LM35IC