Birmingham section has number listing instead of Bullet point

### Link to the page

https://codeyourfuture.github.io/github_issues_prs_practice/

### Steps to reproduce

Open the linked GitHub Pages site and locate the Birmingham section. Inspect the markup responsible for its list, change the rendered numbering to bullet points, and verify the published page displays bullets rather than numbers.

索引モデルが issue の本文から書いたものです。