Update bash

Changes:

- https://github.com/tianon/docker-bash/commit/40d324c: Update 5.1 to 5.1.4, patch 4

library/bash

@@ -8,9 +8,9 @@ Architectures: amd64, arm32v6, arm32v7, arm64v8, i386, ppc64le, s390x
 GitCommit: b589273a1d10b1a3f994843f3cd3943f8fdbba68
 Directory: devel
 
-Tags: 5.1.0, 5.1, 5, latest
+Tags: 5.1.4, 5.1, 5, latest
 Architectures: amd64, arm32v6, arm32v7, arm64v8, i386, ppc64le, s390x
-GitCommit: e467130f2e4d7740cd6e730cfad71e354cb53394
+GitCommit: 40d324c8da655e6834b34d730dba8eaa1f274e47
 Directory: 5.1
 
 Tags: 5.0.18, 5.0