FIX: Local time not updating between user cards (#9564)

The local time was not updating between user cards because the computed property was not used correctly.

There's an old saying in Tennessee — I know it's in Texas, probably in Tennessee — that says, fool me once computed properties, shame on — shame on you. Fool me — you can't get fooled again.

app/assets/javascripts/discourse/app/components/user-card-contents.js

@@ -75,9 +75,8 @@ export default Component.extend(CardContentsBase, CanCheckEmails, CleansUp, {
     return user.resolvedTimezone();
   },
 
-  @discourseComputed()
-  formattedUserLocalTime() {
-    const timezone = this.userTimezone;
+  @discourseComputed("userTimezone")
+  formattedUserLocalTime(timezone) {
     return moment.tz(timezone).format(I18n.t("dates.time_with_zone"));
   },