🚸 Fix and improve MKS LVGL UI (#22783)

Co-authored-by: makerbase <4164049@qq.com>
Co-authored-by: MKS-Sean <56996910+MKS-Sean@users.noreply.github.com>
Co-authored-by: Scott Lahteine <thinkyhead@users.noreply.github.com>

Marlin/src/lcd/extui/mks_ui/mks_hardware.cpp

@@ -714,7 +714,7 @@ void disp_assets_update_progress(const char *msg) {
   char buf[30];
   memset(buf, ' ', COUNT(buf));
   strncpy(buf, msg, strlen(msg));
-  buf[COUNT(buf)-1] = '\0';
+  buf[COUNT(buf) - 1] = '\0';
   disp_string(100, 165, buf, 0xFFFF, 0x0000);
 }