fix: style of var type picker

web/app/components/workflow/nodes/_base/components/variable/var-type-picker.tsx

@@ -43,7 +43,7 @@ const VarReferencePicker: FC<Props> = ({
         offset={4}
       >
         <PortalToFollowElemTrigger onClick={() => setOpen(!open)} className='w-[120px] cursor-pointer'>
-          <div className='flex h-8 items-center justify-between rounded-lg border-0 bg-components-button-secondary-bg px-2.5 text-[13px] text-text-primary'>
+          <div className='flex h-8 items-center justify-between rounded-lg border-0 bg-components-input-bg-normal px-2.5 text-[13px] text-text-primary'>
             <div className='w-0 grow truncate capitalize' title={value}>{value}</div>
             <RiArrowDownSLine className='h-3.5 w-3.5 shrink-0 text-text-secondary' />
           </div>