Merge pull request #1282 from run-ai/self-hosted-setup-airgap

fix airgap script in self-hosted

docs/admin/runai-setup/self-hosted/k8s/preparations.md

@@ -48,7 +48,7 @@ Follow the prerequisites as explained in [Self-Hosted installation over Kubernet
     Run the following script (you must dockerd installed and at least 20GB of free disk space to run): 
 
     ```  
-    sudo -E ./prepare_installation.sh
+    sudo -E ./setup.sh
     ```
 
     If Docker is configured to [run as non-root](https://docs.docker.com/engine/install/linux-postinstall/#manage-docker-as-a-non-root-user){target=_blank} then `sudo` is not required.