Update README.md

Author: SimLi1333

README.md

@@ -96,6 +96,7 @@ The ConditionalRunner leverages Python's built-in logging system to provide insi
 ## Demo
 
 There is a nice, extensive demo [`nornir-conditional-runner-demo`](https://github.com/InfrastructureAsCode-ch/nornir_conditional_runner_demo) done with NetLab by [`Urs Baumann`](https://github.com/ubaumann).
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 Or there are short demos, which can be found in the [demo/demo.py](demo/demo.py) file.
 
 Demo topology with conditional groups: