Reference Google Drive Folder to store Opportunity Canvas Reviews

Why is this change being made?

See comment: Product#867 (comment 308143250)

As a Product Ops initiative, we want to collect the opportunity canvas's in a folder that is accessible to GitLab team members on Google Drive.

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