Update bash

Changes:

- https://github.com/tianon/docker-bash/commit/9cf1db7: Update devel to 20210621, commit 03de84de4a79a8f7e6b87c7377a836356612c685

library/bash

@@ -3,9 +3,9 @@
 Maintainers: Tianon Gravi <[email protected]> (@tianon)
 GitRepo: https://github.com/tianon/docker-bash.git
 
-Tags: devel-20210601, devel
+Tags: devel-20210621, devel
 Architectures: amd64, arm32v6, arm32v7, arm64v8, i386, ppc64le, s390x
-GitCommit: 6f82e043167799b895fde8889540a33507962360
+GitCommit: 9cf1db7dbceafe922c3b2bf3da58d22df9788af1
 Directory: devel
 
 Tags: 5.1.8, 5.1, 5, latest