use env in shebang.

In non FHS-compilant filesystems, binaries are not available in the usual paths. Use
env to load the right application.

Signed-off-by: Roosembert Palacios <[email protected]>

Author: Roosembert Palacios

remarkable.php

@@ -1,4 +1,4 @@
-#!/usr/bin/php
+#!/usr/bin/env php
 <?php
 require_once __DIR__ . '/vendor/autoload.php';
 
@@ -222,4 +222,4 @@ protected function loadToken()
 }
 
 $remarkable = new Remarkable();
-$remarkable->run();
+$remarkable->run();