Update README.md

Author: liuzicheng1987

README.md

@@ -523,7 +523,7 @@ The following compilers are supported:
 ### Option 1: Include source files into your own build
 
 Simply copy the contents of the folder `include` into your source repository or add it to your include path and also add `src/reflectcpp.cpp` and `src/yyjson.c` to your source files for compilation.
-If you want to link to your own version of YYJSON, then only copy `src/reflectcpp.cpp`.
+If you don't need JSON support or want to link to your own version of YYJSON, then only copy `src/reflectcpp.cpp`.
 
 If you need support for other serialization formats like flexbuffers or XML, you should also include and link the respective libraries, as listed in the section on serialization formats.