add back playgrounds file

cbaker6 · cbaker6 · commit 53a9376900c3 · 2021-01-04T09:29:13.000-05:00
diff --git a/ParseSwift.playground/contents.xcplayground b/ParseSwift.playground/contents.xcplayground
@@ -10,5 +10,6 @@
         <page name='7 - GeoPoint'/>
         <page name='8 - Pointers'/>
         <page name='9 - Files'/>
+        <page name='10 - Cloud Code'/>
     </pages>
-</playground>
+</playground>
