Add related component(s) into the published release notes

As a home assistant user, I want to be able to quickly scan the list of release notes to see if any of the components that I use are implicated in the release, so that I don’t have to dive into the PR to see what files have changed.

Sometimes it is obvious:

^ affects the caldav component.

Often it isn’t obvious:

^ affects the media_extractor component.

Possible implementation:
Tag PRs in the release notes with the component(s) they affect (if applicable). Render the tags on the release notes as chips.