User proper ellipsis char

As stated in
https://github.com/profanity-im/profanity/pull/1820#issuecomment-1498083383
profanity uses "..." (three dots) in a lot of places instead the proper
ellipsis char "…".

src/ui/notifier.c

@@ -77,7 +77,7 @@ notifier_uninit(void)
 void
 notify_typing(const char* const name)
 {
-    gchar* message = g_strdup_printf("%s: typing...", name);
+    gchar* message = g_strdup_printf("%s: typing…", name);
     notify(message, 10000, "Incoming message");
     g_free(message);
 }