Do not renew Apple Music after free trisl trisl

Use the instructions in How to cancel a subscription from Apple - Apple Support

Also see the following from that page:

About canceling subscriptions from Apple

• Most subscriptions automatically renew unless you cancel them.
• If you cancel a paid subscription, you can keep using the subscription until the next billing date.
• If you cancel during a free trial period, you might lose access to the subscription immediately.

If you signed up for a free or discounted trial subscription and you don't want to renew it, cancel it at least 24 hours before the trial ends.