Docs(ci): Add documentation about PR requirement workflow

ci/README.md

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 # Workflows in this repository
 
+## Verify PR has JIRA ticket and issue number
+This workflow is designed to enforce requirements for PR descriptions.  At bare minimum it requires the PR to mention a related issue and mention the Jira Ticket number.  Both of these are required since Sync2Jira does not know how to associate a PR with a Jira Ticket from the originating GitHub issue.
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 ## Update parent issue
 The idea behind this workflow is to keep Jira tickets in sync with the current status of their GitHub issue.  A flowchart for how this works can be seen below.