Correct long-form generation config parameters 'max_initial_timestamp_index' and 'prev_sot_token_id'.

Hey openai 👋,

Your model repository seems to contain outdated generation config parameters, such as 'max_initial_timestamp_index' and is missing the 'prev_sot_token_id' parameter. These parameters need to be updated to correctly handle long-form generation as stated in as part of https://github.com/huggingface/transformers/pull/27658. This PR makes sure that everything is up to date and can be safely merged.

Best, the Transformers team.

generation_config.json

@@ -87,10 +87,11 @@
     ]
   ],
   "is_multilingual": false,
-  "max_initial_timestamp_index": 1,
+  "max_initial_timestamp_index": 50,
   "max_length": 448,
   "no_timestamps_token_id": 50362,
   "pad_token_id": 50256,
+  "prev_sot_token_id": 50360,
   "return_timestamps": false,
   "suppress_tokens": [
     1,