DEVDOCS-6180: [update] update plugin code reference link (#771)

<!-- Ticket number or summary of work -->
# [DEVDOCS-6180]


## What changed?
Update reference link

## Release notes draft

Bug Fix
<!-- Provide an entry for the release notes using simple, conversational
language. Don't be too technical. Explain how the change will benefit
the merchant and link to the feature.

Examples:
* The newly-released [X feature] is now available to use. Now, you’ll be
able to [perform Y action].
* We're happy to announce [X feature], which can help you [perform Y
action].
* [X feature] helps you to create [Y response] using the [Z query
parameter]. Now, you can deliver [ex, localized shopping experiences for
your customers].
* Fixed a bug in the [X endpoint]. Now the [Y field] will appear when
you click [Z option]. -->
* 

## Anything else?
<!-- Add related PRs, salient notes, additional ticket numbers, etc. -->

ping {names}


[DEVDOCS-6180]:
https://bigcommercecloud.atlassian.net/browse/DEVDOCS-6180?atlOrigin=eyJpIjoiNWRkNTljNzYxNjVmNDY3MDlhMDU5Y2ZhYzA5YTRkZjUiLCJwIjoiZ2l0aHViLWNvbS1KU1cifQ

docs/storefront/wordpress/platform-integration/code.mdx

@@ -1,11 +1,11 @@
 # BigCommerce for WordPress Plugin Code Reference
 
-To search the BigCommerce for WordPress (BC4WP) codebase for detailed entries on available hooks, functions, classes, and methods, visit the [BigCommerce Plugin Code Reference](https://bigcommerce.moderntribe.qa/).
+To search the BigCommerce for WordPress (BC4WP) codebase for detailed entries on available hooks, functions, classes, and methods, visit the [BigCommerce Plugin Code Reference](https://bc-wordpress-reference.vercel.app/).
 
 ## Usage notes
 
-The following list contains additional notes on the usage of the hooks, functions, classes, and methods found in the [BigCommerce Plugin Code Reference](https://bigcommerce.moderntribe.qa/) that allow you to extend and customize the BC4WP plugin:
+The following list contains additional notes on the usage of the hooks, functions, classes, and methods found in the [BigCommerce Plugin Code Reference](https://bc-wordpress-reference.vercel.app/) that allow you to extend and customize the BC4WP plugin:
 
 ### Classes
 
-  - Refinery - filters product results on product archive or product category archive pages.
+  - Refinery - filters product results on product archive or product category archive pages.