Update README.md

Author: philiplinden

README.md

@@ -15,7 +15,7 @@ yahs --help
 
 ## Run a simulated flight
 ### Configure the sim
-Set the simulation configuration in `config/sim_config.toml`
+Set the simulation configuration in `config/default.toml`
 
 ### Start the sim
 Then use the `start` command to start a flight simulation. Use the `RUST_LOG`
@@ -37,4 +37,4 @@ Then start up a telemetry dashboard.
 ```sh
 firebrick dashboard -t $PATH_TO_TELEMETRY_CSV
 ```
-Then navigate to the server address specified in the log output.
+Then navigate to the server address specified in the log output.