AWS prescriptive-guidance documentation change
Summary
Renamed file from db-instance-monitoring.md to database-instance-monitoring.md. Updated title from 'DB instance monitoring' to 'Database instance monitoring'. Minor text edits including changing 'integrated with Amazon RDS' to 'integrated within Amazon RDS'. Removed 'Sections' listing with internal links.
Security assessment
Changes are structural/naming improvements without security content. Removed sections were navigation links, not security documentation. No vulnerabilities or security features mentioned.