Correct the Copyright header and email address

This is Shopify's copyright, and we should put the team email for
communication.

Author: rafaelfranca

LICENSE.txt

@@ -1,6 +1,6 @@
 The MIT License (MIT)
 
-Copyright (c) 2023 Peter Zhu
+Copyright (c) 2023 Shopify Inc.
 
 Permission is hereby granted, free of charge, to any person obtaining a copy
 of this software and associated documentation files (the "Software"), to deal

shopify-ruby-definitions.gemspec

@@ -6,7 +6,7 @@ Gem::Specification.new do |spec|
   spec.name = "shopify-ruby-definitions"
   spec.version = ShopifyRubyDefinitions::VERSION
   spec.authors = ["Peter Zhu"]
-  spec.email = ["peter@peterzhu.ca"]
+  spec.email = ["ruby@shopify.com"]
 
   spec.summary = "Ruby builds used at Shopify."
   spec.homepage = "https://github.com/Shopify/ruby-definitions"