Update swarm.md

Author: lbeurerkellner

docs/testing/Examples/swarm.md

@@ -18,7 +18,7 @@ pip install openai-swarm
 ```
 
 ## Agent code
-You can view the agent code [here](sample_tests/swarm/capital_finder_agent/capital_finder_agent.py).
+You can view the agent code [here](https://github.com/invariantlabs-ai/invariant/blob/main/invariant/testing/sample_tests/swarm/capital_finder_agent/capital_finder_agent.py)
 
 This can be invoked as:
 
@@ -133,4 +133,4 @@ Finally, we verify that the last message does not contain `Madrid`, consistent w
 
 ## Conclusion
 
-We have seen how to to write unit tests for specific test cases when building an agent with the Swarm framework.
+We have seen how to to write unit tests for specific test cases when building an agent with the Swarm framework.