use most compatible bash shebang

ci/enable-lld.sh

@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/usr/bin/env bash
 
 mkdir -p $HOME/.cargo
 echo -e "[build]\nrustflags = [\"-C\", \"link-arg=-fuse-ld=lld\", \"-C\", \"target-cpu=native\"]" > $HOME/.cargo/config

crates/compiler/builtins/bitcode/benchmark.sh

@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/usr/bin/env bash
 
 set -euxo pipefail
 

crates/compiler/builtins/bitcode/run-tests.sh

@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/usr/bin/env bash
 
 set -euxo pipefail
 

crates/compiler/builtins/bitcode/run-wasm-tests.sh

@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/usr/bin/env bash
 
 set -euxo pipefail
 

www/build.sh

@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/usr/bin/env bash
 
 set -euxo pipefail
 

www/netlify.sh

@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/usr/bin/env bash
 
 # Runs on every Netlify build, to set up the Netlify server.