Update `MSG_PYTHON_MISSING` (#13427)

message.mk

@@ -88,8 +88,8 @@ MSG_FILE_TOO_BIG = $(ERROR_COLOR)The firmware is too large!$(NO_COLOR) $(CURRENT
 MSG_FILE_TOO_SMALL = The firmware is too small! $(CURRENT_SIZE)/$(MAX_SIZE)\n
 MSG_FILE_JUST_RIGHT = The firmware size is fine - $(CURRENT_SIZE)/$(MAX_SIZE) ($(PERCENT_SIZE)%%, $(FREE_SIZE) bytes free)\n
 MSG_FILE_NEAR_LIMIT = The firmware size is approaching the maximum - $(CURRENT_SIZE)/$(MAX_SIZE) ($(PERCENT_SIZE)%%, $(FREE_SIZE) bytes free)\n
-MSG_PYTHON_MISSING = $(ERROR_COLOR)ERROR:$(NO_COLOR) Can not run \"qmk\" command!\n\n\
-	Please run $(BOLD)util/qmk_install.sh$(NO_COLOR) to install all the dependencies QMK requires.\n\n
+MSG_PYTHON_MISSING = $(ERROR_COLOR)ERROR:$(NO_COLOR) Cannot run \"qmk hello\"!\n\n\
+	Please run $(BOLD)qmk setup$(NO_COLOR) to install all the dependencies QMK requires.\n\n
 MSG_FLASH_BOOTLOADER = $(WARN_COLOR)WARNING:$(NO_COLOR) This board's bootloader is not specified or is not supported by the \":flash\" target at this time.\n\n
 MSG_FLASH_ARCH = $(WARN_COLOR)WARNING:$(NO_COLOR) This board's architecture is not supported by the \":flash\" target at this time.\n\n
 MSG_BOOTLOADER_NOT_FOUND = $(ERROR_COLOR)ERROR:$(NO_COLOR) Bootloader not found. Trying again in 5s (Ctrl+C to cancel)\n