Modify the stub. You might need to modify other stubs (for name, synopsis, license, etc) as well.

Split the distribution, or fix the version numbers to make them consistent (use the highest version number to avoid version downgrade).

Add SECURITY(.pod|md). See Software::Security::Policy.

Add SECURITY(.pod|md) and add a contact address. See Software::Security::Policy.

Add CONTRIBUTING(.pod|md). See https://docs.github.com/en/communities/setting-up-your-project-for-healthy-contributions/setting-guidelines-for-repository-contributors.