Add NSM diagram to Release Stage

Why is this change being made?

Add NSM to Release Stage to align with North Star metrics needs

How will this merge request impact page speed?

It wont

Does this MR meet the acceptance criteria?

yes

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