when change the input value, the doc of state does not update

[GongJS]

Describe the bug

this is my code:

<button @click="changeCode">change</button>
<Codemirror
      v-model="code"
      :indent-with-tab="true"
      :tab-size="2"
      @ready="handleReady"
/>

const code = ref('{}')
const state = ref()

const handleReady = (payload) => {
    state.value = payload.state
    console.log( state.value.doc)
}

const changeCode = () => {
    code.value = '{"a": "1"}'
    console.log(state.value.doc)
   // state.value.doc dose not change
}


### Reproduction

if need, i will provide

### System Info

```shell
"vue-codemirror": "^6.1.1"

Used Package Manager

pnpm

Validations

• Read the the documentation in detail.
• Check that there isn't already an issue that reports the same bug to avoid creating a duplicate.
• Check that this is a concrete bug. For Q&A open a GitHub Discussion or join our Discord Chat Server.
• The provided reproduction is a minimal reproducible example of the bug.