Do this from your JIRA (or equivalent) tickets then, you already have user oriented descriptions there. you can easily collect all tasks and bug tickets done during a sprint and generate a changelog. Though in practice I would expect someone to cleanup by hand.
How do you link the tickets to the code that was actually built to be sure the changelog is complete and accurate?
It's usual to include the ticket id in the commit or PR so you can pull it from logs at build time and have a canonical list. Then grab the info to include from the ticketing system.
