Update rabbitmq

Changes:

- https://github.com/docker-library/rabbitmq/commit/4572933: Merge pull request https://github.com/docker-library/rabbitmq/pull/618 from infosiftr/3.12
- https://github.com/docker-library/rabbitmq/commit/1bc76ab: Add 3.12.0-beta.1

library/rabbitmq

@@ -5,6 +5,26 @@ Maintainers: Tianon Gravi <[email protected]> (@tianon),
 GitRepo: https://github.com/docker-library/rabbitmq.git
 Builder: buildkit
 
+Tags: 3.12.0-beta.1, 3.12-rc
+Architectures: amd64, arm32v7, arm64v8, ppc64le, s390x
+GitCommit: 1bc76ab8a311cf03d40c95ac9aedd6d9473d048f
+Directory: 3.12-rc/ubuntu
+
+Tags: 3.12.0-beta.1-management, 3.12-rc-management
+Architectures: amd64, arm32v7, arm64v8, ppc64le, s390x
+GitCommit: 1bc76ab8a311cf03d40c95ac9aedd6d9473d048f
+Directory: 3.12-rc/ubuntu/management
+
+Tags: 3.12.0-beta.1-alpine, 3.12-rc-alpine
+Architectures: amd64, arm32v6, arm32v7, arm64v8, i386, ppc64le, s390x
+GitCommit: 1bc76ab8a311cf03d40c95ac9aedd6d9473d048f
+Directory: 3.12-rc/alpine
+
+Tags: 3.12.0-beta.1-management-alpine, 3.12-rc-management-alpine
+Architectures: amd64, arm32v6, arm32v7, arm64v8, i386, ppc64le, s390x
+GitCommit: 1bc76ab8a311cf03d40c95ac9aedd6d9473d048f
+Directory: 3.12-rc/alpine/management
+
 Tags: 3.11.10, 3.11, 3, latest
 Architectures: amd64, arm32v7, arm64v8, ppc64le, s390x
 GitCommit: dde405ff543c4fa696f146f9b3bc70dcc73bf1f5