Scrub personal emails from example/reference files before going public

.env.example and gscript/Setup.js (the original Apps Script reference)
had real email addresses hardcoded as examples.

gscript/Setup.js

@@ -121,8 +121,8 @@ function createSystemTriggers() {
 }
 function createMyAdmin() {
   return seedFirstAdmin(
-    'filip.thurrigl@gmail.com',
-    'Philipp',
-    'Thürrigl'
+    'owner@example.com',
+    'First',
+    'Last'
   );
 }