Update automatic translation languages

Add Arabic to list of automatic translation-supported languages; change formatting for Chinese to match what we have on other parts of platform

Author: teresayangg

content/en-us/production/localization/automatic-translations.md

@@ -123,11 +123,14 @@ Roblox supports automatic translation between the languages listed below. Curren
   </tr>
 </thead>
 <tbody>
+    <tr>
+    <td>Arabic</td>
+  </tr>
   <tr>
-    <td>Chinese - simplified</td>
+    <td>Chinese (Simplified)</td>
   </tr>
   <tr>
-    <td>Chinese - traditional</td>
+    <td>Chinese (Traditional)</td>
   </tr>
    <tr>
     <td>English</td>