Update rabbitmq

Changes:

- https://github.com/docker-library/rabbitmq/commit/f87b6cb: Update 3.10 to 3.10.21

library/rabbitmq

@@ -45,22 +45,22 @@ Architectures: amd64, arm32v6, arm32v7, arm64v8, i386, ppc64le, s390x
 GitCommit: b41c10aaddc91da62f96994ab62e9d1ea590c455
 Directory: 3.11/alpine/management
 
-Tags: 3.10.20, 3.10
+Tags: 3.10.21, 3.10
 Architectures: amd64, arm32v7, arm64v8, ppc64le, s390x
-GitCommit: e83ba26490c576005582578379678ecbbe6913fb
+GitCommit: f87b6cbcbe25573ea37f58d2449af3bfcedfa122
 Directory: 3.10/ubuntu
 
-Tags: 3.10.20-management, 3.10-management
+Tags: 3.10.21-management, 3.10-management
 Architectures: amd64, arm32v7, arm64v8, ppc64le, s390x
 GitCommit: b41c10aaddc91da62f96994ab62e9d1ea590c455
 Directory: 3.10/ubuntu/management
 
-Tags: 3.10.20-alpine, 3.10-alpine
+Tags: 3.10.21-alpine, 3.10-alpine
 Architectures: amd64, arm32v6, arm32v7, arm64v8, i386, ppc64le, s390x
-GitCommit: e83ba26490c576005582578379678ecbbe6913fb
+GitCommit: f87b6cbcbe25573ea37f58d2449af3bfcedfa122
 Directory: 3.10/alpine
 
-Tags: 3.10.20-management-alpine, 3.10-management-alpine
+Tags: 3.10.21-management-alpine, 3.10-management-alpine
 Architectures: amd64, arm32v6, arm32v7, arm64v8, i386, ppc64le, s390x
 GitCommit: b41c10aaddc91da62f96994ab62e9d1ea590c455
 Directory: 3.10/alpine/management