update doc

examples/demo-stf/src/runtime.rs

@@ -24,7 +24,7 @@
 //! 2. Calls:      
 //!     The `Module` interface defines a `call` method which accepts a module-defined type and triggers the specific `module logic.`
 //!     In general, the point of a call is to change the module state, but if the call throws an error,
-//!     no state is updated (the transaction is reverted).
+//!     no module specific state is updated (the transaction is reverted).
 //!
 //! `#[derive(MessageCodec)` adds deserialization capabilities to the `Runtime` (implements `decode_call` method).
 //! `Runtime::decode_call` accepts serialized call message and returns a type that implements the `DispatchCall` trait.