fix: configure script should use /usr/bin/env

Author: TheButlah

Overlay/configure

@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/usr/bin/env bash
 
 # Configure script for Babble Gaze Eye Tracking
 # Supports macOS and Linux
@@ -511,4 +511,4 @@ print_status "  C Compiler: $CC"
 print_status "  C++ Compiler: $CXX"
 if [[ $ENABLE_TRAINER -eq 1 ]]; then
     print_status "  Python: $PYTHON_EXECUTABLE"
-fi
+fi