[Config] Use #!/usr/bin/env bash for scritps, fixes #2226, thanks to @cptMikky

generate_config.sh

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

update.sh

@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/usr/bin/env bash
 
 #exit on error and pipefail
 set -o pipefail