Update shadow page to emphasis confidentiality of discussions and information

Why is this change being made?

Noting the importance for participants in the shadow program to honour the confidential nature of information and discussions while participating in the program.

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