Duplicated word "use" on TypeScript support page

[fnick851]

On this page: https://v3.vuejs.org/guide/typescript-support.html#typing-refs, there is a small typo.
In "Typing reactive" section, it says "...we can use use interfaces.", which I believe should be "...we can use use interfaces."

[NataliaTepluhina]

@fnick851 thank you for spotting this! Fixed 👍🏻