* adding vietnamese
* ran npm run test:updatesnapshot
* ran npm run test:updatesnapshot
* Update i18n.jsx
* updatesed snapshot
* fix whitespace in snapshots
* add vi as supported server locale
* update docs to point at server-side list of supported locales
* removed incorrect translation
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Co-authored-by: Tom De Moor <tom@controlaltdieliet.be>
Co-authored-by: Mattermost Build <build@mattermost.com>
Co-authored-by: Jesse Hallam <jesse.hallam@gmail.com>
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