fix logit-bias type hint (#1802)

`Optional[Dict[str, float]]` --> `Optional[Dict[int, float]]`

Author: ddh0

llama_cpp/llama.py

@@ -1141,7 +1141,7 @@ def _create_completion(
         stopping_criteria: Optional[StoppingCriteriaList] = None,
         logits_processor: Optional[LogitsProcessorList] = None,
         grammar: Optional[LlamaGrammar] = None,
-        logit_bias: Optional[Dict[str, float]] = None,
+        logit_bias: Optional[Dict[int, float]] = None,
     ) -> Union[
         Iterator[CreateCompletionResponse], Iterator[CreateCompletionStreamResponse]
     ]:
@@ -1761,7 +1761,7 @@ def create_completion(
         stopping_criteria: Optional[StoppingCriteriaList] = None,
         logits_processor: Optional[LogitsProcessorList] = None,
         grammar: Optional[LlamaGrammar] = None,
-        logit_bias: Optional[Dict[str, float]] = None,
+        logit_bias: Optional[Dict[int, float]] = None,
     ) -> Union[CreateCompletionResponse, Iterator[CreateCompletionStreamResponse]]:
         """Generate text from a prompt.
 
@@ -1858,7 +1858,7 @@ def __call__(
         stopping_criteria: Optional[StoppingCriteriaList] = None,
         logits_processor: Optional[LogitsProcessorList] = None,
         grammar: Optional[LlamaGrammar] = None,
-        logit_bias: Optional[Dict[str, float]] = None,
+        logit_bias: Optional[Dict[int, float]] = None,
     ) -> Union[CreateCompletionResponse, Iterator[CreateCompletionStreamResponse]]:
         """Generate text from a prompt.
 
@@ -1951,7 +1951,7 @@ def create_chat_completion(
         model: Optional[str] = None,
         logits_processor: Optional[LogitsProcessorList] = None,
         grammar: Optional[LlamaGrammar] = None,
-        logit_bias: Optional[Dict[str, float]] = None,
+        logit_bias: Optional[Dict[int, float]] = None,
         logprobs: Optional[bool] = None,
         top_logprobs: Optional[int] = None,
     ) -> Union[