doc(dashboard): improve the documentation

Author: hozlucas28

libs/macros.h

@@ -10,7 +10,7 @@
  * It is typically used in conjunction with the `DASHBOARD_COLS` macro to define
  * the size of a grid.
  *
- * @warning The value of `DASHBOARD_ROWS` should be a positive integer.
+ * @warning The value of `DASHBOARD_ROWS` must be a positive integer.
  */
 #define DASHBOARD_ROWS 56
 
@@ -22,7 +22,7 @@
  * It is typically used in conjunction with the `DASHBOARD_ROWS` macro to define
  * the size of a grid.
  *
- * @warning The value of `DASHBOARD_COLS` should be a positive integer.
+ * @warning The value of `DASHBOARD_COLS` must be a positive integer.
  */
 #define DASHBOARD_COLS 110