PIP-190-Part2: Modify the Versions page
Is your feature request related to a problem? Please describe. Refer to PIP-190.
Describe the solution you'd like
As part of PIP-190 implementation, we will narrow the listing of doc versions by modifying the versions.json file. Correspondingly, it brings changes to the last column of release notes, which is auto-generated by scripts.
Considering the main purpose of the Versions page and we already offer a summary page of release notes, we can modify the Versions page as follows.
- remove the last column of specific release notes.
- add a sentence to navigate users to the Release notes page.

cc @urfreespace
@urfreespace thanks for implementing this change. After #17074 is merged, can you pls add one more sentence at the bottom of the page to explain a bit about this versioning change.
Note that starting from 2.8.x, we release and maintain one set of documentation for each minor release and following bug-fix releases.
@momo-jun https://github.com/apache/pulsar-site/pull/157 versions page had been modified.
@urfreespace #17074 has been merged, can you pls implement this change?
@urfreespace thanks for implementing this change. After #17074 is merged, can you pls add one more sentence at the bottom of the page to explain a bit about this versioning change.
Note that starting from 2.8.x, we release and maintain one set of documentation for each minor release and following bug-fix releases.