This PR updates the regex we use to search for issues to not search for
`#NNNN`, as it's not specific enough.
It currently catches issue numbers from other repos, which are then
linked to random Zed issues/PRs that happen to have the same number:
<img width="935" alt="Screenshot 2024-08-15 at 3 50 29 PM"
src="https://github.com/user-attachments/assets/b779e503-3027-43e2-b355-e81d8d094694">
As well as catching PRs:
<img width="924" alt="Screenshot 2024-08-15 at 3 48 59 PM"
src="https://github.com/user-attachments/assets/6c2f7594-9234-4454-97da-5a33a1844892">
Given that:
1. We can't distinguish any given `#NNNN` as an issue _and_ can't ensure
it belongs to the Zed repo
2. Any issue/PR referenced as `#NNNN` will already create a backlink
It seems that looking for these is causing more noise than signal.
Release Notes:
- N/A
df20bae80e