Be more precise in error message about supported boards.

Author: aentinger

Diff for: src/Arduino_AdvancedAnalog.h

@@ -25,7 +25,7 @@
  **************************************************************************************/
 
 #ifdef ARDUINO_PORTENTA_H7_M4
-# error "This library on works on the M7 core of any STM32H747 based board (Portenta H7, Giga, X8)."
+# error "This library only works on the M7 core of any STM32H747 based board (Portenta H7, Giga)."
 #endif
 
 #include "AdvancedADC.h"