Bump rabbitmq:4-management-alpine Docker digest to 556d88a (#6649)

Signed-off-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>
Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

examples/MicroserviceExample/docker-compose.yml

@@ -5,7 +5,7 @@ services:
       - 9411:9411
 
   rabbitmq:
-    image: rabbitmq:4-management-alpine@sha256:5cbd7145b0306399ad68422c3350b6cbd1bb95704b39f5896480e5b6d4238a04
+    image: rabbitmq:4-management-alpine@sha256:556d88a79852874255fd904048fae637e0158ff0a61201ceae7a701fcc48ba2f
     ports:
       - 5672:5672
       - 15672:15672