Files
ragflow/rag/utils
会敲代码的喵 2d9e7b4acd Fix: aliyun oss need to use s3 signature_version (#12766)
### What problem does this PR solve?

Aliyun OSS do not support boto s4 signature_version which will lead to
an error:

```
botocore.exceptions.ClientError: An error occurred (InvalidArgument) when calling the PutObject operation: aws-chunked encoding is not supported with the specified x-amz-content-sha256 value
```

According to aliyun oss docs, oss_conn need to use s3 signature_version.

### Type of change

- [x] Bug Fix (non-breaking change which fixes an issue)
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