Change user to principal in example schema #301

Namespace: <a href="https://detailurl.setting.custom-console-url-namespace.is.not.configured" rel="nofollow">project-kessel-tenant
PipelineRun: <a href="https://console.redhat.com/application-pipeline/ns/project-kessel-tenant/pipelinerun/relations-api-on-pull-request-4t4bb" rel="nofollow">relations-api-on-pull-request-4t4bb

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Status	Duration	Name
✅ Succeeded	6 seconds	init
✅ Succeeded	17 seconds	clone-repository
✅ Succeeded	1 minute	build-container
✅ Succeeded	9 seconds	build-image-index
✅ Succeeded	9 seconds	rpms-signature-scan
✅ Succeeded	43 seconds	sast-snyk-check
✅ Succeeded	47 seconds	clamav-scan
✅ Succeeded	14 seconds	deprecated-base-image-check
✅ Succeeded	18 seconds	push-dockerfile
✅ Succeeded	13 seconds	apply-tags
✅ Succeeded	39 seconds	clair-scan
✅ Succeeded	19 seconds	ecosystem-cert-preflight-checks
✅ Succeeded	24 seconds	show-summary
✅ Succeeded	7 seconds	show-sbom