Update the Azure-storage-blobs crate to point to the new crate

The azure-storage-blobs crate is the old Rust crate. We need to update the crate with a patch release with documentation pointing uses to the new crate.

Action Items:
Update the azure-storage-blobs README.md to inform users the crate is superceded with https://crates.io/crates/azure_storage_blob.
Publish a patch release to azure-storage-blobs to publish this information.

Context:
The azure-storag-blobs crate can be found in the legacy branch of this repo. The change to readme should only be pushed to the legacy branch and the publishing of the crate should come from the legacy branch.