Update rabbitmq

Changes:

- https://github.com/docker-library/rabbitmq/commit/9effc7f: Update to 3.8.5, Erlang/OTP 23.0.2, OpenSSL 1.1.1g
- https://github.com/docker-library/rabbitmq/commit/a5cccf2: Merge pull request https://github.com/docker-library/rabbitmq/pull/369 from st3v/master
- https://github.com/docker-library/rabbitmq/commit/34ed62c: touch config file to verify it is read-only

library/rabbitmq

@@ -6,7 +6,7 @@ GitRepo: https://github.com/docker-library/rabbitmq.git
 
 Tags: 3.8.5, 3.8, 3, latest
 Architectures: amd64, arm32v7, arm64v8, i386, ppc64le, s390x
-GitCommit: 38bc089c287d05d22b03a4d619f7ad9d9a4501bc
+GitCommit: 9effc7f5dce28daa1024aeb3746580ec9e6ece92
 Directory: 3.8/ubuntu
 
 Tags: 3.8.5-management, 3.8-management, 3-management, management
@@ -16,7 +16,7 @@ Directory: 3.8/ubuntu/management
 
 Tags: 3.8.5-alpine, 3.8-alpine, 3-alpine, alpine
 Architectures: amd64, arm32v6, arm32v7, arm64v8, i386, ppc64le, s390x
-GitCommit: 38bc089c287d05d22b03a4d619f7ad9d9a4501bc
+GitCommit: 9effc7f5dce28daa1024aeb3746580ec9e6ece92
 Directory: 3.8/alpine
 
 Tags: 3.8.5-management-alpine, 3.8-management-alpine, 3-management-alpine, management-alpine
@@ -26,7 +26,7 @@ Directory: 3.8/alpine/management
 
 Tags: 3.7.26, 3.7
 Architectures: amd64, arm32v7, arm64v8, i386, ppc64le, s390x
-GitCommit: acec97e07a54919e006f4fbec3934c44ee4c391b
+GitCommit: a5cccf2aa061d8855259d7a05ad8774ee04c4a6f
 Directory: 3.7/ubuntu
 
 Tags: 3.7.26-management, 3.7-management
@@ -36,7 +36,7 @@ Directory: 3.7/ubuntu/management
 
 Tags: 3.7.26-alpine, 3.7-alpine
 Architectures: amd64, arm32v6, arm32v7, arm64v8, i386, ppc64le, s390x
-GitCommit: acec97e07a54919e006f4fbec3934c44ee4c391b
+GitCommit: a5cccf2aa061d8855259d7a05ad8774ee04c4a6f
 Directory: 3.7/alpine
 
 Tags: 3.7.26-management-alpine, 3.7-management-alpine