Update source/images/team/michaeltsellers.jpg

Why is this change being made?

This change is being proposed so that I can be on the team page

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