Support AWS_BEARER_TOKEN_BEDROCK API key env var

docs/models/bedrock.md

@@ -19,6 +19,8 @@ To use [AWS Bedrock](https://aws.amazon.com/bedrock/), you'll need an AWS accoun
 You can set your AWS credentials as environment variables ([among other options](https://boto3.amazonaws.com/v1/documentation/api/latest/guide/configuration.html#using-environment-variables)):
 
 ```bash
+export AWS_BEARER_TOKEN_BEDROCK='your-api-key'
+# or:
 export AWS_ACCESS_KEY_ID='your-access-key'
 export AWS_SECRET_ACCESS_KEY='your-secret-key'
 export AWS_DEFAULT_REGION='us-east-1'  # or your preferred region

pydantic_ai_slim/pyproject.toml

@@ -69,7 +69,7 @@ google = ["google-genai>=1.28.0"]
 anthropic = ["anthropic>=0.61.0"]
 groq = ["groq>=0.19.0"]
 mistral = ["mistralai>=1.9.2"]
-bedrock = ["boto3>=1.37.24"]
+bedrock = ["boto3>=1.39.0"]
 huggingface = ["huggingface-hub[inference]>=0.33.5"]
 # Tools
 duckduckgo = ["ddgs>=9.0.0"]