✏️ Maple warning followup

Followup to #23661

Marlin/src/inc/Warnings.cpp

@@ -757,7 +757,7 @@
 #endif
 
 /**
- * Maple environent
+ * Maple environment
  */
 #ifdef __STM32F1__
   #warning "Maple build environments are deprecated. Please use a non-Maple build environment. Report issues to the Marlin Firmware project."