docker-perl-alt

Validate and update the base image versions, the cpm installer, and AWS Lambda RIE for the docker-perl-alt images, and keep the README version references in sync. TRIGGER when the user asks to check/update/bump base image versions, perl/alpine/chainguard versions, the cpm installer, or the Lambda Runtime Interface Emulator, or types /version-bump. Covers where versions are defined, how to find the latest upstream releases, the checksum verification required for cpm and the Lambda RIE, and how to refresh the README.