fix import for the bedrock model (#1410)

Author: yilololo

pydantic_ai_slim/pydantic_ai/models/bedrock.py

@@ -10,7 +10,6 @@
 
 import anyio
 import anyio.to_thread
-from mypy_boto3_bedrock_runtime.type_defs import ConverseRequestTypeDef, SystemContentBlockTypeDef
 from typing_extensions import ParamSpec, assert_never
 
 from pydantic_ai import _utils, result
@@ -43,12 +42,14 @@
     from mypy_boto3_bedrock_runtime.type_defs import (
         ContentBlockOutputTypeDef,
         ContentBlockUnionTypeDef,
+        ConverseRequestTypeDef,
         ConverseResponseTypeDef,
         ConverseStreamMetadataEventTypeDef,
         ConverseStreamOutputTypeDef,
         ImageBlockTypeDef,
         InferenceConfigurationTypeDef,
         MessageUnionTypeDef,
+        SystemContentBlockTypeDef,
         ToolChoiceTypeDef,
         ToolTypeDef,
     )