Update rabbitmq

Changes:

- https://github.com/docker-library/rabbitmq/commit/7f88620: Update 4.0-rc to 4.0.0-beta.4

library/rabbitmq

@@ -5,22 +5,22 @@ Maintainers: Tianon Gravi <[email protected]> (@tianon),
 GitRepo: https://github.com/docker-library/rabbitmq.git
 Builder: buildkit
 
-Tags: 4.0.0-beta.3, 4.0-rc
+Tags: 4.0.0-beta.4, 4.0-rc
 Architectures: amd64, arm32v7, arm64v8, ppc64le, s390x
-GitCommit: fc362c970aa152f8c0d596f5a81cfc453a2e5eec
+GitCommit: 7f88620e423c04f76b240bf3ab64e321c9d5fd9e
 Directory: 4.0-rc/ubuntu
 
-Tags: 4.0.0-beta.3-management, 4.0-rc-management
+Tags: 4.0.0-beta.4-management, 4.0-rc-management
 Architectures: amd64, arm32v7, arm64v8, ppc64le, s390x
 GitCommit: 3881658e776314fb145db712981c91c52a3e25b8
 Directory: 4.0-rc/ubuntu/management
 
-Tags: 4.0.0-beta.3-alpine, 4.0-rc-alpine
+Tags: 4.0.0-beta.4-alpine, 4.0-rc-alpine
 Architectures: amd64, arm32v6, arm32v7, arm64v8, i386, ppc64le, riscv64, s390x
-GitCommit: fc362c970aa152f8c0d596f5a81cfc453a2e5eec
+GitCommit: 7f88620e423c04f76b240bf3ab64e321c9d5fd9e
 Directory: 4.0-rc/alpine
 
-Tags: 4.0.0-beta.3-management-alpine, 4.0-rc-management-alpine
+Tags: 4.0.0-beta.4-management-alpine, 4.0-rc-management-alpine
 Architectures: amd64, arm32v6, arm32v7, arm64v8, i386, ppc64le, riscv64, s390x
 GitCommit: 3881658e776314fb145db712981c91c52a3e25b8
 Directory: 4.0-rc/alpine/management