Revise labels instructions for appsec review issues

Why is this change being made?

Edit the appsec review page to reflect actual label names

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