vue-codemirror - Change version to Vue3

[mrgrg]

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 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.

[Jogai]

Make a PR for it