fix git-hook bash scripts

devops/git-hooks/pre-commit

@@ -1,4 +1,4 @@
-#!/bin/sh
+#!/usr/bin/env bash
 set -e
 
 echo 'running rust-fmt'

devops/git-hooks/pre-push

@@ -1,4 +1,4 @@
-#!/bin/sh
+#!/usr/bin/env bash
 set -e
 
 FEATURES=