Updated schema-configurations.md to correct the last code example (#3651

)

Co-authored-by: Chris Gill <cgill@indeed.com>

docs/types/schema-configurations.md

@@ -123,5 +123,5 @@ class CustomInfo(Info):
         return self.context["response"].headers
 
 
-schema = strawberry.Schema(query=Query, info_class=CustomInfo)
+schema = strawberry.Schema(query=Query, config=StrawberryConfig(info_class=CustomInfo))
 ```