🐛 Fix STM3R / BEAST envs (#22028)

Marlin/src/pins/pins.h

 #elif MB(MALYAN_M200)
   #include "stm32f1/pins_MALYAN_M200.h"         // STM32F103CB                            env:STM32F103CB_malyan
 #elif MB(STM3R_MINI)
-  #include "stm32f1/pins_STM3R_MINI.h"          // STM32F103RE?                           env:STM32F103RE env:STM32F103RE_maple
+  #include "stm32f1/pins_STM3R_MINI.h"          // STM32F103VE?                           env:STM32F103VE env:STM32F103RE_maple
 #elif MB(GTM32_PRO_VB)
   #include "stm32f1/pins_GTM32_PRO_VB.h"        // STM32F103VE                            env:STM32F103VE env:STM32F103RE_maple
 #elif MB(GTM32_PRO_VD)
 #elif MB(FLSUN_HISPEED)
   #include "stm32f1/pins_FLSUN_HISPEED.h"       // STM32F1                                env:flsun_hispeedv1
 #elif MB(BEAST)
-  #include "stm32f1/pins_BEAST.h"               // STM32F1                                env:STM32F103VE env:STM32F103RE_maple
+  #include "stm32f1/pins_BEAST.h"               // STM32F103VE?                           env:STM32F103VE env:STM32F103RE_maple
 #elif MB(MINGDA_MPX_ARM_MINI)
   #include "stm32f1/pins_MINGDA_MPX_ARM_MINI.h" // STM32F1                                env:mingda_mpx_arm_mini