Syntax fix

keyboards/handwired/promethium/matrix.c

@@ -133,8 +133,8 @@ void matrix_init(void) {
     matrix_init_quantum();
 }
 
-uint8_t matrix_scan(void
-){
+uint8_t matrix_scan(void)
+{
     // Set row, read cols
     for (uint8_t current_row = 0; current_row < MATRIX_ROWS; current_row++) {
 #       if (DEBOUNCING_DELAY > 0)