Revert bad release post image renames

Why is this change being made?

Images were incorrectly renamed in commit 98039a60, causing 404 of images on the 12_7 release post

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