docs: fix typo in join.mdx (#10190)

Author: alexander-cato

docs/fields/join.mdx

@@ -15,7 +15,7 @@ APIs.
 
 The Join field is useful in scenarios including:
 
-- To surface `Order`s for a given `Product`
+- To surface `Orders` for a given `Product`
 - To view and edit `Posts` belonging to a `Category`
 - To work with any bi-directional relationship data
 - Displaying where a document or upload is used in other documents