Updating qtile config and the README.

.config/qtile/autostart.sh

@@ -1,4 +1,8 @@
-#! /bin/bash 
+#!/usr/bin/env bash 
+# 
+# Using bash in the shebang rather than /bin/sh, which should
+# be avoided as non-POSIX shell users (fish) may experience errors.
+
 lxsession &
 picom --experimental-backends &
 nitrogen --restore &