AWS codepipeline documentation change
Summary
File renamed from 'codepipeline-compliance.md' to 'compliance-validation.md', updated PDF anchor reference, and changed 'AWS Artifact' to lowercase 'artifact'
Security assessment
This is primarily a file rename and minor editorial changes. The change from 'AWS Artifact' to 'artifact' appears to be a branding/style update. No security vulnerabilities are addressed, and no new security documentation is added.