Add i18n attr for deprecation notice

63b95ef5041b2144a9826b9ea9f8cac342a1c239

Cohee <18619528+Cohee1207@users.noreply.github.com>

public/index.html+1 -1 Viewed

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                             <span data-i18n="(DEPRECATED)">(DEPRECATED)</span>
                             <span data-i18n="Extras API:">Extras API:</span>
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