review (remove participant count unknown)

Signed-off-by: Timo K <toger5@hotmail.de>

public/locales/en-GB/app.json

@@ -102,7 +102,6 @@
   "mute_microphone_button_label": "Mute microphone",
   "participant_count_one": "{{count, number}}",
   "participant_count_other": "{{count, number}}",
-  "participant_count_unkonwn": "unknown",
   "rageshake_button_error_caption": "Retry sending logs",
   "rageshake_request_modal": {
     "body": "Another user on this call is having an issue. In order to better diagnose these issues we'd like to collect a debug log.",

src/Header.tsx

@@ -158,9 +158,7 @@ export const RoomHeaderInfo: FC<RoomHeaderInfoProps> = ({
             aria-label={t("header_participants_label")}
           />
           <Text as="span" size="sm" weight="medium">
-            {participantCount
-              ? t("participant_count", { count: participantCount })
-              : t("participant_count_unkonwn")}
+            {t("participant_count", { count: participantCount ?? 0 })}
           </Text>
         </div>
       )}