add a link to track the /etc/hosts issue

Author: kayrus

action.yaml

@@ -32,6 +32,7 @@ runs:
     - name: Workaround for RabbitMQ
       run: |
         # fix freaky leading "-e" in /etc/hosts
+        # see https://github.com/actions/runner-images/issues/12192
         sudo sed -i 's/^-e \+//g' /etc/hosts
         sudo apt-get purge -y esl-erlang || true
         sudo apt-get install -y erlang rabbitmq-server # if rabbitmq-server is not installed, tests must be stopped