Update README.md

HttpUtility tip

Signed-off-by: Firekeeper <[email protected]>

Author: 0xFirekeeper

README.md

@@ -37,7 +37,9 @@ The SDK has been tested on Web, Desktop and Mobile platforms using Unity 2021 an
 
 The example scenes are built using Unity 2022 LTS.
 
-Note: The Newtonsoft DLL is included as part of the Unity Package, feel free to deselect it if you already have it installed as a dependency to avoid conflicts.
+Notes: 
+- The Newtonsoft DLL is included as part of the Unity Package, feel free to deselect it if you already have it installed as a dependency to avoid conflicts.
+- If using .NET Framework and encountering an error related to HttpUtility, create a file `csc.rsp` that includes `-r:System.Web.dll` and save it under `Assets`.
 
 # Build