Specify bash as our shell

In case the runner uses a different shell.

artifactserver/tools/get_workspace_status.sh

@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/usr/bin/env bash
 # Copyright 2018 The Kubernetes Authors.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");

dns/check-zone.sh

@@ -1,4 +1,4 @@
-#!/bin/sh
+#!/usr/bin/env bash
 #
 # This runs as you.  It assumes you have built an image named ${USER}/octodns.
 # It also requires working gcloud credentials

dns/push.sh

@@ -1,4 +1,4 @@
-#!/bin/sh
+#!/usr/bin/env bash
 
 # This runs as you.  It assumes you have built an image named ${USER}/octodns.
 

k8s.gcr.io/ensure-prod-repo.sh

@@ -1,4 +1,4 @@
-#!/bin/sh
+#!/usr/bin/env bash
 #
 # Copyright 2019 The Kubernetes Authors.
 #

k8s.gcr.io/ensure-staging-repo.sh

@@ -1,4 +1,4 @@
-#!/bin/sh
+#!/usr/bin/env bash
 #
 # Copyright 2019 The Kubernetes Authors.
 #

k8s.gcr.io/lib.sh

@@ -1,4 +1,4 @@
-#!/bin/sh
+#!/usr/bin/env bash
 #
 # Copyright 2019 The Kubernetes Authors.
 #

k8s.io/canary.sh

@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/usr/bin/env bash
 
 set -o errexit
 set -o nounset