Debugging TLS builds on CI is fun, round 5

Author: michaelklishin

.github/workflows/ci.yaml

@@ -144,6 +144,7 @@ jobs:
       - name: Start RabbitMQ with TLS
         run: |
           docker run -d --name rabbitmq-tls \
+            -e RABBITMQ_ERLANG_COOKIE='test-secret-cookie' \
             -p 15671:15671 \
             -p 15672:15672 \
             -p 5672:5672 \