rgw swift versioning option added

PROD-19885

Change-Id: I94b817098da8ac7a432f9625aa4eb7d915e5d0de
diff --git a/README.rst b/README.rst
index 9cdf64a..bc8e2b6 100644
--- a/README.rst
+++ b/README.rst
@@ -450,6 +450,9 @@
           password: password
           project: admin
           domain: default
+        swift:
+          versioning:
+            enabled: true
 
 
 Ceph setup role