Add twitter account for Uzbekistan

[Mamasodikov]

Description

Add the official Twitter account of Uzbekistan. I own a telegram group also, which is on the list (https://t.me/dartdevuz)

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Checklist

• [x] I read How to contribute
• [x] I edited the SOURCE.md file only
• [x] Added a link to the repo in the PR

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[KollerWithDoris]

这是来自QQ邮箱的假期自动回复邮件。您好，我最近正在休假中，无法亲自回复您的邮件。我将在假期结束后，尽快给您回复。

[Solido]

Not active. Thx.