[Glitch] Profile editing: Add singular to translated string

Port 3ed16489d0 to glitch-soc

Signed-off-by: Claire <claire.github-309c@sitedethib.com>

app/javascript/flavours/glitch/features/account_edit/featured_tags.tsx

@@ -96,7 +96,7 @@ function renderTag(tag: ApiFeaturedTagJSON) {
       {tag.statuses_count > 0 && (
         <FormattedMessage
           id='account_edit_tags.tag_status_count'
-          defaultMessage='{count} posts'
+          defaultMessage='{count, plural, one {# post} other {# posts}}'
           values={{ count: tag.statuses_count }}
           tagName='p'
         />