MDL-36621 calendar: fixed up conflict error

lib/db/caches.php

@@ -104,12 +104,12 @@ $definitions = array(
         'simpledata' => true, // Array of stdClass objects containing only strings.
         'persist' => true, // Likely there will be a couple of calls to this.
         'persistmaxsize' => 2, // The original cache used 1, we've increased that to two.
-    )
+    ),
      // Used to cache calendar subscriptions.
     'calendar_subscriptions' => array(
         'mode' => cache_store::MODE_APPLICATION,
         'simplekeys' => true,
         'simpledata' => true,
         'persistent' => true,
-    ),
+    )
 );