[enhancement] add related issues mentioned in commit message footer

[BobAnkh]

Is your feature request related to a problem? Please describe

Sometimes users may link commits to the relevant issues in the footer of the commit message.

Description of the new feature/enhancement

Parse the footer of a commit message to see if it includes an issue and add it to the changelog.

Proposed technical implementation details (optional)

As above

Additional context

[issue-label-bot]

Issue-Label Bot is automatically applying the label enhancement to this issue, with a confidence of 1.00. Please mark this comment with 👍 or 👎 to give our bot feedback!

Links: app homepage, dashboard and code for this bot.

[gitmagic-app]

Everything looks good 👍