Add link to Early Access & Update page templates for new scripted install page

JBDS-2768 created a useful web page about scripted installations: https://devstudio.jboss.com/usage/scripted-install/

A link to this page should be added to both the Early Access and Update page templates. I think the best place to add the info is in the right-hand info box "Installation :: Core Tooling". I think the text should come after the 3 steps for installing and read:
"Installing can also be completed using scripts. For more information see <link>."