feat: update boto3 to version 1.40.4 (#169)

Updates boto3 from 1.37.0 to 1.40.4 and botocore from 1.37.0 to 1.40.4. This update enables support for AWS_BEARER_TOKEN_BEDROCK functionality and includes the latest AWS service features and bug fixes.

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-authored-by: Claude <[email protected]>

Author: LionsAd

src/requirements.txt

@@ -5,5 +5,5 @@ mangum==0.17.0
 tiktoken==0.6.0
 requests==2.32.4
 numpy==1.26.4
-boto3==1.37.0
-botocore==1.37.0
+boto3==1.40.4
+botocore==1.40.4