add note to use nightly when using serve on autopilot (#970)

Author: volatilemolotov

tutorials-and-examples/skypilot/dws-and-kueue/README.md

@@ -123,6 +123,7 @@ pip install -U "skypilot[kubernetes]"
 # Verify the installation
 sky -v
 ```
+Note: If using Autopilot GKE cluster please install nightly version of skypilot `skypilot-nightly[kubernetes]`
 
 3. Find the context names
 ```bash
@@ -427,3 +428,15 @@ volumes:
         bucketName: MODEL_BUCKET_NAME
         mountOptions: "implicit-dirs,uid=1000,gid=1000"
 ```
+5. Denied by autogke-gpu-limitation
+
+When running `sky serve` on Autopilot cluster GKE Warden rejects the pods
+
+```
+"kind":"Status","apiVersion":"v1","metadata":{},"status":"Failure","message":"admission webhook \"warden-validating.common-webhooks.networking.gke.io\" denied the request: GKE Warden rejected the request because it violates one or more constraints.\nViolations details: {\"[denied by autogke-gpu-limitation]\":[\"The toleration with key 'nvidia.com/gpu' and operator 'Exists' cannot be specified if the pod does not request to use GPU in Autopilot.\"
+```
+Update SkyPilot to a nightly release using 
+```
+pip install -U "skypilot-nightly[kubernetes]"
+```
+[More Details](https://github.com/skypilot-org/skypilot/issues/4542)