Study of PF-07038124 Ointment Compared With Plain Ointment in the Treatment of Participants With Mild to Moderate Atopic Dermatitis or Plaque Psoriasis. A Phase 2a, Randomized, Double Blind, Vehicle Controlled, Parallel Group Study to Assess the Efficacy, Safety, Tolerability, and Pharmacokinetics of PF-07038124 Ointment for 6 Weeks in Participants With Mild to Moderate Atopic Dermatitis or Plaque Psoriasis.