fix(VProgressLinear): set aria-valuenow to current value

[SonTT19]

Description

fixes #19894

Markup:

<template>
  <v-app>
    <v-container>
      <v-progress-linear v-model="current" max="4" />
    </v-container>
  </v-app>
</template>

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

  const current = ref(2)
</script>