Update README of bus simulation demo

ls-bus-guide/demos/can-bus-simulation/README.md

@@ -6,7 +6,8 @@ The FMU provides terminals to connect exactly two nodes.
 Currently, the bus simulation provides the following capabilities:
 - Forwarding of CAN frames and sending confirmations
 - Basic timing simulation based on baud rate
-- Basic frame priorization
+- Basic simulation of arbitration
+- Basic error injection
 
 The FMU requires a simulator with support for triggered and countdown clocks, event mode and variable step size.
 
@@ -26,3 +27,6 @@ This FMU can then be loaded by an importer or precompiled using, e.g., FMPy.
 
 To run the FMU, a supported simulator and two CAN node FMUs (e.g., from the demo `can-node-triggered-output`) are required.
 The node FMUs must be connected to the `Node1` and `Node2` terminals.
+
+To simulate bus errors, you can configure the variable `BusErrorProbability` to specify a probability of an error
+being simulated by the bus simulation FMU for a single frame. You can specify value between 0.0 and 1.0.