Update bash

Changes:

- https://github.com/tianon/docker-bash/commit/b9cde7b: Update devel to 20210524, commit 2047e28584f4200b55b5b704f798bcf1607b9ac6

library/bash

@@ -3,9 +3,9 @@
 Maintainers: Tianon Gravi <[email protected]> (@tianon)
 GitRepo: https://github.com/tianon/docker-bash.git
 
-Tags: devel-20210517, devel
+Tags: devel-20210524, devel
 Architectures: amd64, arm32v6, arm32v7, arm64v8, i386, ppc64le, s390x
-GitCommit: a6994861a80ef8f657baae590567aeea25eb4b0d
+GitCommit: b9cde7be0b014f78fa04ddcfb1da144b3466778b
 Directory: devel
 
 Tags: 5.1.8, 5.1, 5, latest