vue-codemirror - Change version to Vue3

**The link on the list leads to the current version which says:**
„_vue-codemirror v5/v6 has been released. This is a new version based on [CodeMirror@6](https://codemirror.net/) and is available to Vue3 only_.”
So in the vuejs/awesome-vue list, the description text should change to v3 instead of v2, for clarity.