Update workflow to ensure there is an area label

[nwmac]

Summary

Fixes #15778

Occurred changes and/or fixed issues

Simple change to the GH workflow that is executed on issues being opened, so that it ensures there is an area label on newly created issues.

We use area/dashboard as the default.

Checklist

• The PR is linked to an issue and the linked issue has a Milestone, or no issue is needed
• The PR has a Milestone
• The PR template has been filled out
• The PR has been self reviewed
• The PR has a reviewer assigned
• The PR has automated tests or clear instructions for manual tests and the linked issue has appropriate QA labels, or tests are not needed
• The PR has reviewed with UX and tested in light and dark mode, or there are no UX changes
• The PR has been reviewed in terms of Accessibility
• The PR has considered, and if applicable tested with, the three Global Roles Admin, Standard User and User Base

[aalves08]

LGTM