如何取消选中绑定到vuex store state数组项的复选框？

<template>
  <div>
    <label v-for="(item, index) in items" :key="index">
      <input type="checkbox" v-model="item.checked" />
      {{ item.label }}
    </label>
  </div>
</template>

// store.js
import Vue from 'vue';
import Vuex from 'vuex';

Vue.use(Vuex);

export default new Vuex.Store({
  state: {
    items: [
      { label: 'Item 1', checked: false },
      { label: 'Item 2', checked: true },
      { label: 'Item 3', checked: false },
    ],
  },
  // ...
});

// store.js
export default new Vuex.Store({
  // ...
  mutations: {
    uncheckItem(state, index) {
      state.items[index].checked = false;
    },
  },
});

<template>
  <div>
    <label v-for="(item, index) in items" :key="index">
      <input type="checkbox" v-model="item.checked" @change="uncheckItem(index)" />
      {{ item.label }}
    </label>
  </div>
</template>

<script>
import { mapMutations } from 'vuex';

export default {
  // ...
  methods: {
    ...mapMutations(['uncheckItem']),
  },
};
</script>