Added an updated, interim process for upgrading to opengraph images over specific twitter cards

Why is this change being made?

Explaining an update as part of our iteration on evolving tag/image use from Twitter cards to opengraph (which ought to be available across all channels)

Does this MR meet the acceptance criteria?

Conformity

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