[Pallas TPU] Add a note in the Pallas Quickstart documentation about the instructions of running the existing example on TPU
This fixes https://github.com/jax-ml/jax/issues/22817
This changes is originally proposed by @justinjfu in the comments of the above issue.
This PR is related to https://github.com/jax-ml/jax/pull/23885.
PiperOrigin-RevId: 679487218