Fix character encoding issue in subforum titles

app/Knockout/Subforum.php

@@ -18,7 +18,7 @@ class Subforum {
         $s = new self();
 
         $s->id              = $subforum->id;
-        $s->name            = $subforum->name;
+        $s->name            = iconv('UTF-8', 'ASCII//TRANSLIT', $subforum->name);
         $s->description     = $subforum->description ?? null;
 
         // grab threads if available