amendmend to the doc link

Author: himeshsiriwardana

en/identity-server/is_common.yml

@@ -55,7 +55,7 @@ extra:
     doc: https://is.docs.wso2.com/en/versions
     all:
       - name: 7.2.0
-        doc: https://is.docs.wso2.com/en/7.1.0
+        doc: https://is.docs.wso2.com/en/7.2.0
         notes: https://is.docs.wso2.com/en/7.2.0/get-started/about-this-release
       - name: 7.1.0
         doc: https://is.docs.wso2.com/en/7.1.0