Update Chainguard OSV urls

[xnox]

Update Chainguard OSV urls.

Reference:

• google/osv.dev@89320fe

[jess-lowe]

LGTM, but per repo rules, the commit needs to be signed off :)

To do so:

1. Ensure you have a local copy of your branch by checking out the pull request locally via command line.
2. In your local branch, run: git rebase HEAD~1 --signoff
3. Force push your changes to overwrite the branch: git push --force-with-lease origin main

Thanks!