CNI docs: Fix return code
Closes-Bug:
@@ -284,7 +284,7 @@ For reference see updated pod creation flow diagram:
**Function**: Is equivalent of running ``K8sCNIPlugin.add``.
-**Return code:** 201 Created
+**Return code:** 202 Accepted
**Return body:** Returns VIF data in JSON form. This is serialized
oslo.versionedobject from ``os_vif`` library. On the other side it can be
