♻️(scripts) improve script portability

Improved script portability by switching to `/usr/bin/env bash`, ensuring
better support across environments where `bash` may not be the default shell.

bin/install-external-secrets.sh

@@ -1,4 +1,4 @@
-#!/bin/sh
+#!/usr/bin/env bash
 set -o errexit
 
 CURRENT_DIR=$(pwd)

bin/install-hooks.sh

@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/usr/bin/env bash
 
 mkdir -p "$(dirname -- "${BASH_SOURCE[0]}")/../.git/hooks/"
 PRE_COMMIT_FILE="$(dirname -- "${BASH_SOURCE[0]}")/../.git/hooks/pre-commit"

bin/start-kind.sh

@@ -1,3 +1,3 @@
-#!/bin/bash
+#!/usr/bin/env bash
 
 curl https://raw.githubusercontent.com/numerique-gouv/tools/refs/heads/main/kind/create_cluster.sh | bash -s -- meet

bin/update-git-submodule.sh

@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/usr/bin/env bash
 
 git submodule update --init --recursive
 git submodule foreach 'git fetch origin; git checkout $(git rev-parse --abbrev-ref HEAD); git reset --hard origin/$(git rev-parse --abbrev-ref HEAD); git submodule update --recursive; git clean -dfx'

bin/update-keys.sh

@@ -1,3 +1,3 @@
-#!/bin/bash
+#!/usr/bin/env bash
 
 find . -name "*.enc.*" -exec sops updatekeys -y {} \;

bin/validate-helm-configuration.sh

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

src/helm/meet/generate-readme.sh

@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/usr/bin/env bash
 
 docker image ls | grep readme-generator-for-helm
 if [ "$?" -ne "0" ]; then