docs: Update capabilities
//! # delorean_object_store
//!
-//! This crate provides APIs for interacting with object storage services.
-//!
-//! Work remaining in the first milestone:
-//!
-//! - Google Cloud Storage
-//! - PUT
-//! - GET
-//! - DELETE
-//! - List all objects given a prefix
-//! - S3
-//! - PUT
-//! - GET
-//! - DELETE
-//! - List all objects given a prefix
+//! This crate provides APIs for interacting with object storage services. It currently supports
+//! PUT, GET, DELETE, and list for Google Cloud Storage, Amazon S3, and in-memory storage.
//!
//! Future compatibility will include Azure Blob Storage, Minio, and Ceph.
