Added clarity in 'Host' section for Zoom webinars

Why is this change being made?

Added clarity in 'Host' section for Zoom webinars

Does this MR meet the acceptance criteria?

yes

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