This PR updates the Danger rules to check for GitHub issue links that
aren't in the desired format:
<img width="916" alt="Screenshot 2024-07-17 at 5 11 48 PM"
src="https://github.com/user-attachments/assets/c77d3c28-3b09-44aa-a97f-03c2400df2e6">
We don't yet check that the links are exactly formatted as expected,
just that they aren't incorrectly formatted in the way that people
typically get it wrong.
Release Notes:
- N/A
