Update CHANGELOG

Author: andyw8

CHANGELOG.md

@@ -6,6 +6,8 @@
 
 * [#802](https://github.com/Shopify/shopify_api/pull/802) Made `inventory_quantity` a read-only field in Variant
 
+* [#817](https://github.com/Shopify/shopify_api/pull/817) Fix ActiveSupport dependency for Rails 6.1.0
+
 ## Version 9.2.0
 
 * Removes the `shopify` binary which will be used by the Shopify CLI