📝 update documentation (#4723)

Signed-off-by: Niels Lohmann <mail@nlohmann.me>

docs/mkdocs/docs/api/basic_json/is_structured.md

@@ -55,8 +55,8 @@ Note that though strings are containers in C++, they are treated as primitive va
 ## See also
 
 - [is_primitive()](is_primitive.md) returns whether JSON value is primitive
-- [is_array()](is_array.md) returns whether value is an array
-- [is_object()](is_object.md) returns whether value is an object
+- [is_array()](is_array.md) returns whether the value is an array
+- [is_object()](is_object.md) returns whether the value is an object
 
 ## Version history