### What is this PR for?
After https://github.com/apache/zeppelin/pull/3211, some link in README.md need to be updated.

### What type of PR is it?
Bug Fix

### What is the Jira issue?
https://issues.apache.org/jira/browse/ZEPPELIN-3836

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

Author: Lee moon soo <leemoonsoo@gmail.com>

Closes #3214 from Leemoonsoo/ZEPPELIN-3836-followup and squashes the following commits:

ba2fe1cf3 [Lee moon soo] http -> https
7257366f1 [Lee moon soo] update install, source build link