fix json include

Author: ochafik

common/minja/chat-template.hpp

@@ -20,7 +20,7 @@
 #include <string>
 #include <vector>
 
-#include <nlohmann/json.hpp>
+#include <json.hpp>
 
 using json = nlohmann::ordered_json;
 

common/minja/minja.hpp

@@ -28,7 +28,7 @@
 #include <utility>
 #include <vector>
 
-#include <nlohmann/json.hpp>
+#include <json.hpp>
 
 using json = nlohmann::ordered_json;