fix: markdown lint issues in COS docs

Author: Sidra-009

mkdocs/docs/configuration.md

@@ -203,7 +203,7 @@ No additional dependencies are required.
 
 | Key                  | Example                        | Description |
 | -------------------- | ------------------------------ | ----------- |
-| s3.endpoint          | https://cos.ap-guangzhou.myqcloud.com | Tencent COS S3-compatible endpoint |
+| s3.endpoint          | <https://cos.ap-guangzhou.myqcloud.com> | Tencent COS S3-compatible endpoint |
 | s3.access-key-id     | `<access-key>`                 | Access key for COS |
 | s3.secret-access-key | `<secret-key>`                  | Secret key for COS |
 | s3.session-token     | `<optional-session-token>`      | Optional session token |