Fix functions with empty params (#19647)

* Fix functions with empty params

* Found a bunch more

keyboards/handwired/onekey/keymaps/digitizer/keymap.c

@@ -32,7 +32,7 @@ void keyboard_post_init_user(void) {
     digitizer_in_range_on();
 }
 
-void matrix_scan_user() {
+void matrix_scan_user(void) {
     if (timer_elapsed32(timer) < 200) {
         return;
     }

keyboards/handwired/onekey/keymaps/joystick/keymap.c

@@ -8,7 +8,7 @@ const uint16_t PROGMEM keymaps[][MATRIX_ROWS][MATRIX_COLS] = {
     LAYOUT_ortho_1x1(JS_0)
 };
 
-void matrix_scan_user() {
+void matrix_scan_user(void) {
     int16_t val = (((uint32_t)timer_read() % 5000 - 2500) * 255) / 5000;
     joystick_set_axis(1, val);
 }