improve workflow comment

Author: peterargue

.github/workflows/ci.yml

@@ -321,7 +321,8 @@ jobs:
           username: ${{ vars.DOCKERHUB_USERNAME }}
           password: ${{ secrets.DOCKERHUB_TOKEN }}
         if: ${{ (github.event_name == 'merge_group' || (github.event.pull_request && (github.event.pull_request.author_association == 'MEMBER' || github.event.pull_request.author_association == 'COLLABORATOR'))) }}
-        continue-on-error: true # authenticating with dockerhub is optional. continue even if this fails.
+        # this docker auth is only exclusively for higher rate limits. continue unauthenticated if this fails
+        continue-on-error: true
 
 
       - name: Docker build