Update docker

Changes:

- https://github.com/docker-library/docker/commit/b3cd7c2: Update to 19.03.5-beta2

library/docker

@@ -4,22 +4,22 @@ Maintainers: Tianon Gravi <[email protected]> (@tianon),
              Joseph Ferguson <[email protected]> (@yosifkit)
 GitRepo: https://github.com/docker-library/docker.git
 
-Tags: 19.03.5-beta1, 19.03-rc, rc, test
+Tags: 19.03.5-beta2, 19.03-rc, rc, test
 Architectures: amd64, arm32v6, arm32v7, arm64v8
-GitCommit: 21b17056a748a279997729c7d26ddb23e4fe5d5e
+GitCommit: b3cd7c227ec0d1713229a74547628afeb27c2456
 Directory: 19.03-rc
 
-Tags: 19.03.5-beta1-dind, 19.03-rc-dind, rc-dind, test-dind
+Tags: 19.03.5-beta2-dind, 19.03-rc-dind, rc-dind, test-dind
 Architectures: amd64, arm32v6, arm32v7, arm64v8
 GitCommit: 92d278e671f32a9ee4a3c0668e46a41f4a3b74b0
 Directory: 19.03-rc/dind
 
-Tags: 19.03.5-beta1-dind-rootless, 19.03-rc-dind-rootless, rc-dind-rootless, test-dind-rootless
+Tags: 19.03.5-beta2-dind-rootless, 19.03-rc-dind-rootless, rc-dind-rootless, test-dind-rootless
 Architectures: amd64
 GitCommit: c01ffa41486f70c34f020c769bc5bddf106367ea
 Directory: 19.03-rc/dind-rootless
 
-Tags: 19.03.5-beta1-git, 19.03-rc-git, rc-git, test-git
+Tags: 19.03.5-beta2-git, 19.03-rc-git, rc-git, test-git
 Architectures: amd64, arm32v6, arm32v7, arm64v8
 GitCommit: 98ffef81ebfa7601a9ed2f0bf56d78f426bf253c
 Directory: 19.03-rc/git