Update bash

Changes:

- https://github.com/tianon/docker-bash/commit/f693dac: Update to commit 8f576adedb5a2fddef50383ac1f2e45ddcbb2bf5

library/bash

@@ -3,9 +3,9 @@
 Maintainers: Tianon Gravi <[email protected]> (@tianon)
 GitRepo: https://github.com/tianon/docker-bash.git
 
-Tags: devel-20200228, devel
+Tags: devel-20200306, devel
 Architectures: amd64, arm32v6, arm32v7, arm64v8, i386, ppc64le, s390x
-GitCommit: 656db9c66048dd0ecf88173bee52dd674f84ad9f
+GitCommit: f693dac1f86a1fe2459f3fa913022fa4166b2356
 Directory: devel
 
 Tags: 5.0.16, 5.0, 5, latest