Update azure-container-app-job.md

[irwins]

#You need the objectId of the application to update the certificateCredentials Invoke-MgGraphRequest -Method PATCH -Uri "https://graph.microsoft.com/v1.0/applications/$applicationObjectId" -Body $body

#or you can use the applicationId Invoke-MgGraphRequest -Method PATCH -Uri "https://graph.microsoft.com/v1.0/applications(appId='$applicationId')" -Body $body