Update bash

Changes:

- https://github.com/tianon/docker-bash/commit/e2d3792: Adjust link in devel Dockerfile (now that we're not always referencing the top commit)
- https://github.com/tianon/docker-bash/commit/ecde522: Update devel to 20210322, commit b37342db4fb8861821bf03c53163a3e517c81ace

library/bash

@@ -3,9 +3,9 @@
 Maintainers: Tianon Gravi <[email protected]> (@tianon)
 GitRepo: https://github.com/tianon/docker-bash.git
 
-Tags: devel-20210315, devel
+Tags: devel-20210322, devel
 Architectures: amd64, arm32v6, arm32v7, arm64v8, i386, ppc64le, s390x
-GitCommit: 5e48786cd7ca85ac0a8ca8113c885a4e1d4da07d
+GitCommit: e2d3792f49520d1d1ce01ec123b685aadc1b1ea4
 Directory: devel
 
 Tags: 5.1.4, 5.1, 5, latest