[Keyboard] Fix inconsistent MATRIX_COLS: 4pplet/steezy60 (#9678)

keyboards/4pplet/steezy60/rev_a/config.h

@@ -12,7 +12,7 @@
 
 /* key matrix size */
 #define MATRIX_ROWS 5
-#define MATRIX_COLS 15
+#define MATRIX_COLS 14
 // ROWS: Top to bottom, COLS: Left to right
 #define MATRIX_ROW_PINS {C2,D0,B0,C7,C5}
 #define MATRIX_COL_PINS {C4,C6,B7,B6,B5,B4,B3,B2,B1,D6,D5,D4,D2,D1}