Update bash

Changes:

- https://github.com/tianon/docker-bash/commit/6ca1845: Update devel to 20210127, commit fcad1d1e84c3b56b440b2d04e17ad243f41975d0
- https://github.com/tianon/docker-bash/commit/7ac6e5e: Update devel to 20210122, commit 4be5608573b2be2e31f3d2a01446e22e1c9d7839

library/bash

@@ -3,9 +3,9 @@
 Maintainers: Tianon Gravi <[email protected]> (@tianon)
 GitRepo: https://github.com/tianon/docker-bash.git
 
-Tags: devel-20210121, devel
+Tags: devel-20210127, devel
 Architectures: amd64, arm32v6, arm32v7, arm64v8, i386, ppc64le, s390x
-GitCommit: 667f5e52f50ef8cdf3d03ab0aa86b9f90c77c726
+GitCommit: 6ca1845cd04c0b5907da841933bf227d1d3cdb04
 Directory: devel
 
 Tags: 5.1.4, 5.1, 5, latest