Updated nlohmann::basicjson::max_size (markdown)

nlohmann::basic_json::max_size.md

@@ -57,5 +57,5 @@ Maximum size of a JSON array is 1152921504606846975
 
 ## See also
 
-- [**size**](https://github.com/nlohmann/json/wiki/nlohmann::basicjson::size)<br>
+- [**size**](https://github.com/nlohmann/json/wiki/nlohmann::basic_json::size)<br>
 returns the number of elements