HTML Proofer: Also ignore github.com URLs.

Author: sjrd

.github/workflows/ci.yml

@@ -36,12 +36,13 @@ jobs:
         run: |
           # Check all links
           # Don't check links to twitter.com because they return 400 all the time
+          # Also ignore github.com because we have too many and they eventually return 429
           bundle exec htmlproofer ./_site/\
              --only-4xx\
              --ignore-empty-alt=true\
              --allow-hash-href=true\
              --enforce-https=false\
              --ignore-missing-alt=true\
              --swap-urls "https\:\/\/scala\.epfl\.ch:"\
-             --ignore-urls "/twitter.com/,/x.com/"\
+             --ignore-urls "/twitter.com/,/x.com/,/github.com/"\
              --cache '{ "timeframe": { "external": "30d" } }'