Add Bonezegei_74HC595 repository link (#7213)

Author: bonezegei

repositories.txt

@@ -1832,6 +1832,7 @@ https://github.com/bonezegei/Bonezegei_WS2812
 https://github.com/bonezegei/Bonezegei_XPT2046
 https://github.com/bonezegei/Bonezegei_XPT2046v2
 https://github.com/bonezegei/Bonezegei_JSON
+https://github.com/bonezegei/Bonezegei_74HC595
 https://github.com/boodskap/BoodskapMessage
 https://github.com/BoodskapPlatform/BoodskapTransceiver
 https://github.com/boothinator/AnalogReadAsync