(MODULES-5379) Update puppetlabs-azure Instructions
(MODULES-5379) Update puppetlabs-azure Instructions

* Current instructions link to 2.0 CLI which does not apply to the
current instructions.
* Mention that this uses 1.0 CLI and update link to it (old one
redirects to 2.0 CLI)
* Note that 2.0 CLI exists but is not used by these instructions.
* Fixed index reference.

gregohardy/puppetlabs-azure,puppetlabs/puppetlabs-azure