AWS prescriptive-guidance documentation change
Summary
Renamed file from welcome.md to introduction.md; updated references and links accordingly. Changed section title from 'Targeted business outcomes' to 'Objectives'. Removed author affiliations and document history date. Minor text edits including apostrophe correction and migration tense change.
Security assessment
Changes are administrative/editorial (file rename, link updates, section title change) with no security-related content additions or modifications. No vulnerabilities, security controls, or incidents are referenced.