Update repositories.txt

Rename from DWIN_DGUS_HMI to DWIN_UNI_HMI
Update URL for https://github.com/askinkeles/DWIN_UNI_HMI

Author: askinkeles

repositories.txt

@@ -8661,3 +8661,4 @@ https://github.com/goBILDA-Official/goBILDA-Pinpoint-Arduino-Library
 https://github.com/dac1e/AT24CxEeprom
 https://github.com/askinkeles/DWIN_DGUS_HMI
 https://github.com/JorgeGBeltre/MQTTOTA
+https://github.com/askinkeles/DWIN_UNI_HMI