[Doc] [Jobs] Add more links to remote port forwarding setup (#44484)

ray dashboard must be run to set up port forwarding before the Ray Dashboard can be used for REST APIs like the Ray Jobs API. This is described in a docs section, but the section isn't linked to from all the relevant places. This PR adds some links to it from the Job SDK doc, to help reduce user confusion.

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Signed-off-by: Archit Kulkarni <[email protected]>

doc/source/cluster/running-applications/job-submission/sdk.rst

@@ -48,13 +48,14 @@ Let's start with a sample script that can be run locally. The following script u
  ray.init()
  print(ray.get(hello_world.remote()))
 
-SDK calls are made via a ``JobSubmissionClient`` object. To initialize the client, provide the Ray cluster head node address and the port used by the Ray Dashboard (``8265`` by default). For this example, we'll use a local Ray cluster, but the same example will work for remote Ray cluster addresses.
+SDK calls are made via a ``JobSubmissionClient`` object. To initialize the client, provide the Ray cluster head node address and the port used by the Ray Dashboard (``8265`` by default). For this example, we'll use a local Ray cluster, but the same example will work for remote Ray cluster addresses; see 
+:ref:`Using a Remote Cluster <jobs-remote-cluster>` for details on setting up port forwarding.
 
 .. code-block:: python
 
  from ray.job_submission import JobSubmissionClient
 
- # If using a remote cluster, replace 127.0.0.1 with the head node's IP address.
+ # If using a remote cluster, replace 127.0.0.1 with the head node's IP address or set up port forwarding.
  client = JobSubmissionClient("http:https://127.0.0.1:8265")
  job_id = client.submit_job(
  # Entrypoint shell command to execute
@@ -246,4 +247,4 @@ The ``verify`` parameter can be set to override this behavior. For example:
  client = JobSubmissionClient("https://<job-server-url>", verify="/path/to/cert.pem")
 
 will use the certificate found at ``/path/to/cert.pem`` to verify the job server's certificate.
-Certificate verification can be disabled by setting the ``verify`` parameter to ``False``.
+Certificate verification can be disabled by setting the ``verify`` parameter to ``False``.