[ZEPPELIN-3423] Fix deprecated dynamic forms document URL on Python README.md
[ZEPPELIN-3423] Fix deprecated dynamic forms document URL on Python README.md

[ZEPPELIN-3423] Fix deprecated dynamic forms document URL on Python README.md

 ### What is this PR for?
Python dynamic forms document URL is based on "0.6.0-SNAPSHOT" and already deprecated.
Replace the deprecated URL with the latest URL.

 ### What type of PR is it?
Documentation

 ### Todos
N/A

 ### What is the Jira issue?
https://issues.apache.org/jira/browse/ZEPPELIN-3423

 ### How should this be tested?
N/A

 ### Screenshots (if appropriate)

 ### Questions:
* Does the licenses files need update? No
* Is there breaking changes for older versions? No
* Does this needs documentation? No

Author: Changhyup Jwa <jwagun@gmail.com>

Closes #2939 from jwagun/ZEPPELIN-3423 and squashes the following commits:

360261c2f [Changhyup Jwa] [ZEPPELIN-3423] Fix deprecated dynamic forms document URL on Python README.md

Change-Id: I540a222678a82d6f88d91bf8790acf4fca19d992

apache/incubator-zeppelin,karuppayya/zeppelin,hammertank/zeppelin,Leemoonsoo/zeppelin,prabhjyotsingh/zeppelin,zetaris/zeppelin,jongyoul/zeppelin,zetaris/zeppelin,cquptEthan/incubator-zeppelin,karuppayya/zeppelin,karuppayya/zeppelin,jongyoul/zeppelin,apache/zeppelin,r-kamath/incubator-zeppelin,joroKr21/incubator-zeppelin,zjffdu/zeppelin,Leemoonsoo/incubator-zeppelin,zetaris/zeppelin,herval/zeppelin,prabhjyotsingh/incubator-zeppelin,mwkang/zeppelin,prabhjyotsingh/zeppelin,sergeymazin/zeppelin,herval/zeppelin,mwkang/zeppelin,prabhjyotsingh/incubator-zeppelin,karuppayya/zeppelin,karuppayya/zeppelin,prabhjyotsingh/incubator-zeppelin,Leemoonsoo/zeppelin,Leemoonsoo/zeppelin,zjffdu/zeppelin,r-kamath/zeppelin,apache/zeppelin,joroKr21/incubator-zeppelin,hammertank/zeppelin,herval/zeppelin,sergeymazin/zeppelin,r-kamath/zeppelin,jongyoul/zeppelin,sergeymazin/zeppelin,fogbeam/zeppelin_mirror,prabhjyotsingh/incubator-zeppelin,r-kamath/incubator-zeppelin,datalayer/zeppelin-datalayer,jongyoul/zeppelin,jongyoul/incubator-zeppelin,jongyoul/zeppelin,VipinRathor/zeppelin,r-kamath/zeppelin,r-kamath/zeppelin,Leemoonsoo/zeppelin,Leemoonsoo/zeppelin,apache/zeppelin,cquptEthan/incubator-zeppelin,hammertank/zeppelin,r-kamath/zeppelin,zjffdu/zeppelin,fogbeam/zeppelin_mirror,cquptEthan/incubator-zeppelin,r-kamath/incubator-zeppelin,jongyoul/incubator-zeppelin,sergeymazin/zeppelin,zjffdu/zeppelin,apache/incubator-zeppelin,r-kamath/incubator-zeppelin,joroKr21/incubator-zeppelin,joroKr21/incubator-zeppelin,jongyoul/incubator-zeppelin,cquptEthan/incubator-zeppelin,joroKr21/incubator-zeppelin,fogbeam/zeppelin_mirror,mwkang/zeppelin,prabhjyotsingh/zeppelin,VipinRathor/zeppelin,fogbeam/zeppelin_mirror,sergeymazin/zeppelin,mwkang/zeppelin,Leemoonsoo/incubator-zeppelin,jongyoul/zeppelin,zjffdu/zeppelin,herval/zeppelin,Leemoonsoo/incubator-zeppelin,r-kamath/zeppelin,jongyoul/incubator-zeppelin,zetaris/zeppelin,r-kamath/incubator-zeppelin,VipinRathor/zeppelin,datalayer/zeppelin-datalayer,VipinRathor/zeppelin,apache/zeppelin,fogbeam/zeppelin_mirror,cquptEthan/incubator-zeppelin,fogbeam/zeppelin_mirror,mwkang/zeppelin,jongyoul/incubator-zeppelin,joroKr21/incubator-zeppelin,herval/zeppelin,sergeymazin/zeppelin,prabhjyotsingh/zeppelin,apache/incubator-zeppelin,herval/zeppelin,apache/incubator-zeppelin,apache/incubator-zeppelin,karuppayya/zeppelin,hammertank/zeppelin,prabhjyotsingh/zeppelin,joroKr21/incubator-zeppelin,Leemoonsoo/zeppelin,zetaris/zeppelin,VipinRathor/zeppelin,prabhjyotsingh/zeppelin,Leemoonsoo/incubator-zeppelin,apache/incubator-zeppelin,jongyoul/zeppelin,apache/zeppelin,apache/zeppelin,Leemoonsoo/incubator-zeppelin,joroKr21/incubator-zeppelin,r-kamath/incubator-zeppelin,Leemoonsoo/zeppelin,cquptEthan/incubator-zeppelin,fogbeam/zeppelin_mirror,zjffdu/zeppelin,karuppayya/zeppelin,zetaris/zeppelin,zetaris/zeppelin,VipinRathor/zeppelin,hammertank/zeppelin,prabhjyotsingh/incubator-zeppelin,mwkang/zeppelin,r-kamath/zeppelin,sergeymazin/zeppelin,zjffdu/zeppelin,Leemoonsoo/zeppelin,herval/zeppelin,apache/zeppelin,mwkang/zeppelin,cquptEthan/incubator-zeppelin,VipinRathor/zeppelin,Leemoonsoo/incubator-zeppelin,hammertank/zeppelin,prabhjyotsingh/zeppelin,jongyoul/incubator-zeppelin,datalayer/zeppelin-datalayer,prabhjyotsingh/incubator-zeppelin,datalayer/zeppelin-datalayer,hammertank/zeppelin,r-kamath/incubator-zeppelin