Link the updated public setup guide

README.md

@@ -76,7 +76,7 @@ The response should report `backend: nomad` and the downloaded checkpoint path.
 
 ## Run a navigation task
 
-Follow the published [Habitat setup guide](https://github.com/zju3dv/SuperNav/blob/80a59a4c1dfe4f03528a0800a0d30d5a37c6244f/docs/release/en/habitat.md) to prepare Habitat-GS, scene assets/NavMeshes, the agent, and an external task manifest. In the agent environment:
+Follow the published [Habitat setup guide](https://github.com/zju3dv/SuperNav/blob/main/docs/release/en/habitat.md) to prepare Habitat-GS, scene assets/NavMeshes, the agent, and an external task manifest. In the agent environment:
 
 ```bash
 export SUPERNAV_HABITAT_PYTHON=/absolute/path/to/habitat-env/bin/python