fix(VDatePicker): fix select current month or year

[SonTT19]

Description

fixes #19132

Markup:

<template>
  <v-app>
    <v-container>
      <v-date-picker v-model="date" view-mode="months" />
      <v-date-picker v-model="date" view-mode="year" />
      <v-date-picker v-model="date" />
    </v-container>
  </v-app>
</template>

<script setup>
  import { ref } from 'vue'

  const date = ref(new Date())
</script>