Update rabbitmq

Changes:

- https://github.com/docker-library/rabbitmq/commit/817847d: Update to 3.7.27-rc.1, Erlang/OTP 22.3.4.2, OpenSSL 1.1.1g
- https://github.com/docker-library/rabbitmq/commit/420735a: Merge pull request https://github.com/docker-library/rabbitmq/pull/421 from infosiftr/alpine3.12
- https://github.com/docker-library/rabbitmq/commit/4f8112f: Update to alpine:3.12

library/rabbitmq

@@ -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: 9effc7f5dce28daa1024aeb3746580ec9e6ece92
+GitCommit: 4f8112ffb99b813a1b46bcfc704c02e1b8821773
 Directory: 3.8/alpine
 
 Tags: 3.8.5-management-alpine, 3.8-management-alpine, 3-management-alpine, management-alpine
@@ -24,6 +24,26 @@ Architectures: amd64, arm32v6, arm32v7, arm64v8, i386, ppc64le, s390x
 GitCommit: 13d43346f3c0b4de9a15c9589ecdf8b3e22b689c
 Directory: 3.8/alpine/management
 
+Tags: 3.7.27-rc.1, 3.7-rc
+Architectures: amd64, arm32v7, arm64v8, i386, ppc64le, s390x
+GitCommit: 817847dd5566c5d0526d7b654f19c45c91f3289d
+Directory: 3.7-rc/ubuntu
+
+Tags: 3.7.27-rc.1-management, 3.7-rc-management
+Architectures: amd64, arm32v7, arm64v8, i386, ppc64le, s390x
+GitCommit: 817847dd5566c5d0526d7b654f19c45c91f3289d
+Directory: 3.7-rc/ubuntu/management
+
+Tags: 3.7.27-rc.1-alpine, 3.7-rc-alpine
+Architectures: amd64, arm32v6, arm32v7, arm64v8, i386, ppc64le, s390x
+GitCommit: 817847dd5566c5d0526d7b654f19c45c91f3289d
+Directory: 3.7-rc/alpine
+
+Tags: 3.7.27-rc.1-management-alpine, 3.7-rc-management-alpine
+Architectures: amd64, arm32v6, arm32v7, arm64v8, i386, ppc64le, s390x
+GitCommit: 817847dd5566c5d0526d7b654f19c45c91f3289d
+Directory: 3.7-rc/alpine/management
+
 Tags: 3.7.26, 3.7
 Architectures: amd64, arm32v7, arm64v8, i386, ppc64le, s390x
 GitCommit: a5cccf2aa061d8855259d7a05ad8774ee04c4a6f
@@ -36,7 +56,7 @@ Directory: 3.7/ubuntu/management
 
 Tags: 3.7.26-alpine, 3.7-alpine
 Architectures: amd64, arm32v6, arm32v7, arm64v8, i386, ppc64le, s390x
-GitCommit: a5cccf2aa061d8855259d7a05ad8774ee04c4a6f
+GitCommit: 4f8112ffb99b813a1b46bcfc704c02e1b8821773
 Directory: 3.7/alpine
 
 Tags: 3.7.26-management-alpine, 3.7-management-alpine