Modified a number of scripts using "/bin/env" to make it
"/usr/bin/env", since the "/bin" location does not exist on some
versions of Linux.
diff --git a/sky130/custom/scripts/fixspice.py b/sky130/custom/scripts/fixspice.py
index f1ff86f..a44cde8 100755
--- a/sky130/custom/scripts/fixspice.py
+++ b/sky130/custom/scripts/fixspice.py
@@ -1,4 +1,4 @@
-#!/bin/env python3
+#!/usr/bin/env python3
 #
 # fixspice ---
 #