Document special implementation of "restart".

examples/host-example-01-opencyphal-basic-node/README.md

@@ -56,6 +56,7 @@ Store changed configuration and restart node:
 $ y cmd 42 store
 $ y cmd 42 restart
 ```
+**Note**: `restart` is implemented in this example as `exit(0)`, hence you need to restart the application yourself.
 
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 ```bash