Use GitHub token built into GHA

Okay, now we're at problem 74 with github actions. Basically, github
actions doesn't send secrets to forks because duh, that makes sense. So
even if you make a super restricted token you still can't send it to
forks because github still doesn't understand how to make a security
platform when they just copy paste azure pipelines into github and then
say "well looks good to me" and ship fucking arbitrary code execution to
the entire fucking world and then try to retroactively fix all of their
mistakes and fail miserably in the process

.github/workflows/danger.yml

@@ -18,5 +18,5 @@ jobs:
           noChangelogLabel: Blocked
           checkNotification: Simple
         env:
-          GITHUB_TOKEN: ${{ secrets.CARDINAL_PAT_CI_STATUS }}
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}