Add product and custom fields links

Fix formatting of Categories translation link

Author: bc-terra

docs/store-operations/translations/index.mdx

@@ -44,6 +44,8 @@ For more information on OAuth Scopes, see our [Guide to API Accounts](/docs/star
 * Avoid redundant translations by checking existing translations first
 
 ## Resources
+* [Translations for Products (Beta)](/docs/store-operations/translations/products)
+  * [Translations for Custom Fields(Beta)](/docs/store-operations/translations/product-custom-fields)
 * [Translations for Brands (Beta)](/docs/store-operations/translations/brands)
-* [Translations for Categories(Beta)](/docs/store-operations/translations/categories)
+* [Translations for Categories (Beta)](/docs/store-operations/translations/categories)
 * [Translations for Locations (Beta)](/docs/store-operations/translations/locations)