Update bash

Changes:

- https://github.com/tianon/docker-bash/commit/667f5e5: Update devel to 20210121, commit 38881450edebdac007b736e8e959ca01ff7bd919
- https://github.com/tianon/docker-bash/commit/3781e85: Update devel to 20210115, commit 3aec0ec30fe33bb55c0f98fda8c0db392a1eb403

library/bash

@@ -3,9 +3,9 @@
 Maintainers: Tianon Gravi <[email protected]> (@tianon)
 GitRepo: https://github.com/tianon/docker-bash.git
 
-Tags: devel-20210112, devel
+Tags: devel-20210121, devel
 Architectures: amd64, arm32v6, arm32v7, arm64v8, i386, ppc64le, s390x
-GitCommit: a2f55c40b5e12cbc064d8e04eb86214b0688fe38
+GitCommit: 667f5e52f50ef8cdf3d03ab0aa86b9f90c77c726
 Directory: devel
 
 Tags: 5.1.4, 5.1, 5, latest