💚 Update STM32F103RET6_creality test path

buildroot/tests/STM32F103RET6_creality

 #
 # Build with configs included in the PR
 #
-use_example_configs "Creality/Ender-3 V2"
+use_example_configs "Creality/Ender-3 V2/CrealityUI"
 opt_enable MARLIN_DEV_MODE BUFFER_MONITORING
 exec_test $1 $2 "Ender 3 v2" "$3"
 
-use_example_configs "Creality/Ender-3 V2"
+use_example_configs "Creality/Ender-3 V2/CrealityUI"
 opt_disable CLASSIC_JERK
 opt_add SDCARD_EEPROM_EMULATION
 opt_set TEMP_SENSOR_BED 0