Add exit criteria to real-time working group page

Why is this change being made?

Adds exit criteria to the Real-Time Working Group page.

How will this merge request impact page speed?

N/A

Does this MR meet the acceptance criteria?

Assign to DRI

• Did you assign this change to the correct DRI of the page or information you are changing?

Conformity

• Added description to this MR explaining the reasons for the proposed change, per say-why-not-just-what