Add API cheat sheet link and tweak styling #423

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Status	Duration	Name
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✅ Succeeded	9 seconds	clone-repository
✅ Succeeded	9 seconds	prefetch-dependencies
✅ Succeeded	4 minutes	build-container
✅ Succeeded	19 seconds	build-image-index
✅ Succeeded	22 seconds	rpms-signature-scan
✅ Succeeded	22 seconds	deprecated-base-image-check
✅ Succeeded	57 seconds	ecosystem-cert-preflight-checks
✅ Succeeded	13 seconds	apply-tags
✅ Succeeded	10 seconds	push-dockerfile
✅ Succeeded	18 seconds	sast-snyk-check
✅ Succeeded	34 seconds	clair-scan
✅ Succeeded	8 minutes	clamav-scan
✅ Succeeded	15 seconds	show-sbom