Refine object operations and multi-object delete sections

Updated the formatting and structure of the object operations and multi-object delete sections in the README.

README.md

@@ -9,20 +9,24 @@ Bucket operations:
 - `HEAD /{bucket}`
 - `DELETE /{bucket}`
 - `GET /` (list buckets)
+- 
 Object operations:
 - `PUT /{bucket}/{key}`
 - `GET /{bucket}/{key}`
 - `HEAD /{bucket}/{key}`
 - `DELETE /{bucket}/{key}`
 - `GET /{bucket}?list-type=2&prefix=...` (ListObjectsV2-style)
+
 Multipart upload:
 - `POST /{bucket}/{key}?uploads` (initiate)
 - `PUT /{bucket}/{key}?uploadId=...&partNumber=N` (upload part)
 - `GET /{bucket}/{key}?uploadId=...` (list parts)
 - `POST /{bucket}/{key}?uploadId=...` (complete)
 - `DELETE /{bucket}/{key}?uploadId=...` (abort)
- Multi-object delete:
+
+Multi-object delete:
 - `POST /{bucket}?delete` with S3-style XML body
+
 AWS SigV4 streaming payload decoding for uploads (`aws-chunked` request bodies)
 
 ## Limitations