Fix command syntax in README for asm option

Author: nenoNaninu

README.md

@@ -233,7 +233,7 @@ const participants = await hubProxy.getParticipants()
 By default, only types defined in the project specified by the --project option are targeted for transpiling. By passing the --asm true option, types contained in project/package reference assemblies will also be targeted for transpiling.
 
 ```bash
-$ dotnet tsrts --project path/to/Project.csproj --output generated -asm true
+$ dotnet tsrts --project path/to/Project.csproj --output generated --asm true
 ```
 
 ## Supported Types