Make get_version use bash from $PATH (#287)

* Make get_version use bash from $PATH

* Update CHANGELOG.md

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Co-authored-by: ReFil <31960031+ReFil@users.noreply.github.com>

bin/get_version.sh

@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/usr/bin/env bash
 
 # Get the date, first 4 chars of branch name and short commit hash
 date=$(date -u +"%Y%m%d")