Use localhost address instead of `in_process_client` in colab example.
Use localhost address instead of `in_process_client` in colab example.

When using `.in_process_client()` to construct the client its `server_address` resolves to an ipv6 address (i.e `[::1]:PORT`) which doesn't seem to work with colab runtime.

PiperOrigin-RevId: 314317202
Change-Id: Ia961e955a26a85a0d3f27af7c14dfd207c760e20

deepmind/reverb,deepmind/reverb,deepmind/reverb,deepmind/reverb