Add MLX90641 repository link (#7423)

Author: dndubins

repositories.txt

@@ -2574,6 +2574,7 @@ https://github.com/dndubins/tinyServo85
 https://github.com/dndubins/EEPROMsimple
 https://github.com/dndubins/QuickStats
 https://github.com/dndubins/SRAMsimple
+https://github.com/dndubins/MLX90641
 https://github.com/dniklaus/arduino-display-lcdkeypad
 https://github.com/dniklaus/spin-timer
 https://github.com/dniklaus/wiring-timer