add smoke test for configure via yaml file

README.md

@@ -126,6 +126,15 @@ Setting HAM ID to KI1345 and turning off encryption
 Writing modified channels to device
 ```
 
+## Changing multiple settings from a yaml file
+
+You can put parameters into a yaml file to update multiple values. See the example_config.yml.
+
+This is how you might call it:
+```
+meshtastic --configure example_config.yaml
+```
+
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