Explain what shipped, email stakeholders. Every one is ready to run, and you can adjust it in plain language.
Carry merged changes into the changelog before release signoff.
Your GitHub changelog stays current as pull requests merge, and your maintainer gets a dated section and link after release approval.
Give release owners a sourced changelog draft for the ready branch.
Get a GitLab changelog draft in an issue, with changes grouped by type and linked to the work behind them.
Document changes as each tagged version goes out.
Your GitHub releases get readable notes as new tags arrive, with changes grouped by type and linked to commits.