Docs: Update stale docs and remove mention of legacy hostname

Ahead of the repository being renamed, I've created a redirect
for the new name at jquery-cdn. This patch removes any in-repo
mentions of the legacy hostname.

Author: Krinkle

CONTRIBUTING.md

@@ -1,5 +1,9 @@
-Welcome! Thanks for your interest in contributing to codeorigin.jquery.com. You're **almost** in the right place. More information on how to contribute to this and all other jQuery Foundation projects is over at [contribute.jquery.org](http://contribute.jquery.org). You'll definitely want to take a look at the articles on contributing [to our websites](http://contribute.jquery.org/web-sites/).
+# Contribute
 
-You may also want to take a look at our [commit & pull request guide](http://contribute.jquery.org/commits-and-pull-requests/) and [style guides](http://contribute.jquery.org/style-guide/) for instructions on how to maintain your fork and submit your code. Before we can merge any pull request, we'll also need you to sign our [contributor license agreement](http://contribute.jquery.org/cla).
+Welcome! Thanks for your interest in contributing to jQuery CDN.
 
-You can find us on [IRC](http://irc.jquery.org), specifically in #jquery-content should you have any questions. If you've never contributed to open source before, we've put together [a short guide with tips, tricks, and ideas on getting started](http://contribute.jquery.org/open-source/).
+You may also want to take a look at our [commit & pull request guide](https://contribute.jquery.org/commits-and-pull-requests/). Before we can merge any pull request, we'll also need you to sign our [contributor license agreement](https://contribute.jquery.org/cla).
+
+If you've never contributed to open source before, we've put together [a short guide with tips, tricks, and ideas on getting started](https://contribute.jquery.org/open-source/).
+
+You can find us in [#jquery](ircs://irc.libera.chat:6697#jquery) on Libera Chat IRC ([webchat](https://web.libera.chat/#jquery)), or in [#jquery_dev:gitter.im](https://matrix.to/#/#jquery_dev:gitter.im) on Matrix.

LICENSE.txt

@@ -2,7 +2,7 @@ Copyright OpenJS Foundation and other contributors, https://openjsf.org/
 
 This software consists of voluntary contributions made by many
 individuals. For exact contribution history, see the revision history
-available at https://github.com/jquery/codeorigin.jquery.com
+available at https://github.com/jquery/jquery-cdn
 
 Permission is hereby granted, free of charge, to any person obtaining
 a copy of this software and associated documentation files (the

README.md

@@ -1,4 +1,4 @@
-codeorigin.jquery.com
+jQuery CDN
 =====================
 
 ## Add new assets

config-sample.json

@@ -1,4 +1,5 @@
 {
+  "name": "jquery-cdn",
   "private": true,
   "dependencies": {
     "grunt": "1.5.3",