[Bugfix] Update expected token counts for Ultravox tests

[DarkLight1337]

This PR fixes another problem introduced by the updated HF processor for Ultravox v0.5. For more context, see #13871 a mismatch in token counts introduced by #13871

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[DarkLight1337]

Actually it seems that the output token count has been changed by #13871, let me update the expected token count.

[DarkLight1337]

Tests pass locally - merging.