Fix Hubert models in TFHubertModel and TFHubertForCTC documentation code
# What does this PR do?

This PR updates the used models in the `TFHubertModel` and `TFHubertModelForCTC` example codes to the same model used in `HubertModel` and `HubertModelForCTC` other examples in the same documentation as `"facebook/hubert-base-960h"` does not exist and the actual code doesn't run.
_The documentation is not available anymore as the PR was closed or merged._