bump php sdk version by 0.0.1

Summary: as titled

Reviewed By: stcheng, satwikareddy3

Differential Revision: D64510329

fbshipit-source-id: e006b90dd6328f41849ad63252ce592e684b4558

src/FacebookAds/ApiConfig.php

@@ -10,6 +10,6 @@
 namespace FacebookAds;
 class ApiConfig {
   const APIVersion = '21.0';
-  const SDKVersion = '21.0.0';
+  const SDKVersion = '21.0.1';
   const TYPE_CHECKER_STRICT_MODE = false;
 }