What's New In JIRA Link Broken in JIRA

Summary

When navigating to the What's New option within JIRA, the screen pops up points to broken link. The link in 6.3.10 points to https://docs.atlassian.com/jira/docs-063/whatsnew/ which redirects to a page that doesn't exist. The current Whats New page is found at https://www.atlassian.com/software/jira/whats-new. This functionality has been removed as of 6.4.1

On version 6.3.15 What's New window navigating to below links which are not available:

• https://www.googletagmanager.com/gtm.js?id=GTM-MLBVG3&l=dataLayer
• https://confluence.atlassian.com/display/JIRA063/whatsnew/iframe?od=false&a=true&pa=true

Steps To Reproduce

• Pull up any JIRA system prior to 6.4
• Select the Question Mark Icon at the top right
• From the dropdown select What's New

Actual behavior

User encounters Page Not Found or Oops. We are having trouble... as attached on screenshots