Incorrect use of "Shebang"

[ghuber-github]

https://github.com/fantaosha/LLDB-Eigen-Pretty-Printer/blob/e6766b7e985d4c5a65ef2b564045e06b9876fa46/tools/install.sh#L1

This line should read #!/bin/bash or even better #!/usr/bin/env bash (found it because the install script didn't work in my zsh environment.