Update ironbank-pipeline README.md

This template is ONLY used for quick fixes/adds (primarily for tracking smaller issues). New feature request, pipeline enhancement, and bug issues should use the other template options for issue submission. Remember to describe variables, artifacts, inputs to include, common issues

Quick Fix / Add

Update the pipeline documentation to reflect the changes that were made since it was originally created.

Interested Party

Erryone

Acceptance criteria

• Overall Pipeline readme
• Per stage readme