Automator: update common-files@master in istio/istio.io@master (#15467)

Makefile

@@ -19,7 +19,7 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-SHELL := /bin/bash
+SHELL := /usr/bin/env bash
 
 # allow optional per-repo overrides
 -include Makefile.overrides.mk

common/.commonfiles.sha

@@ -1 +1 @@
-bd7126fd447f48a5ae17590921baca332ab0593c
+410e7d88eae562d4cef8d48fbc56099e270202b2

common/scripts/run.sh

@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/usr/bin/env bash
 
 # WARNING: DO NOT EDIT, THIS FILE IS PROBABLY A COPY
 #

common/scripts/setup_env.sh

@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/usr/bin/env bash
 # shellcheck disable=SC2034
 
 # WARNING: DO NOT EDIT, THIS FILE IS PROBABLY A COPY