Update MKS Robin Nano auto-build env (#18417)

Marlin/src/pins/pins.h

 #elif MB(MKS_ROBIN_MINI)
   #include "stm32f1/pins_MKS_ROBIN_MINI.h"      // STM32F1                                env:mks_robin_mini
 #elif MB(MKS_ROBIN_NANO)
-  #include "stm32f1/pins_MKS_ROBIN_NANO.h"      // STM32F1                                env:mks_robin_nano
+  #include "stm32f1/pins_MKS_ROBIN_NANO.h"      // STM32F1                                env:mks_robin_nano env:mks_robin_nano35
 #elif MB(MKS_ROBIN_LITE)
   #include "stm32f1/pins_MKS_ROBIN_LITE.h"      // STM32F1                                env:mks_robin_lite
 #elif MB(BTT_SKR_MINI_V1_1)

platformio.ini

   -DMCU_STM32F103VE
 
 #
-# MKS Robin Nano (STM32F103VET6)
+# MKS Robin Nano (STM32F103VET6) - Emulated Graphical 128x64 (DOGM) UI
 #
 [env:mks_robin_nano]
 platform      = ${common_stm32f1.platform}
   LiquidCrystal, LiquidTWI2, TMCStepper, U8glib-HAL, SoftwareSerialM
 
 #
-# MKS Robin Nano (STM32F103VET6)
+# MKS Robin Nano (STM32F103VET6) - MKS UI (LVGL)
 #
 [env:mks_robin_nano35]
 platform      = ststm32