chore: update repository URL after GitHub rename

GitHub renamed the repo from donglora/protocol to donglora/protocol-rs (the Rust implementation is now distinguished from a forthcoming protocol-py sibling). Update Cargo.toml repository/homepage and README badge / link URLs so the published 1.0.0 crate points at the new location.

README.md

@@ -1,6 +1,6 @@
 # donglora-protocol
 
-[![CI](https://github.com/donglora/protocol/actions/workflows/ci.yml/badge.svg)](https://github.com/donglora/protocol/actions/workflows/ci.yml)
+[![CI](https://github.com/donglora/protocol-rs/actions/workflows/ci.yml/badge.svg)](https://github.com/donglora/protocol-rs/actions/workflows/ci.yml)
 [![Crates.io](https://img.shields.io/crates/v/donglora-protocol.svg)](https://crates.io/crates/donglora-protocol)
 [![Docs.rs](https://docs.rs/donglora-protocol/badge.svg)](https://docs.rs/donglora-protocol)
 
@@ -10,7 +10,7 @@ zero-alloc, fixed-width little-endian. See [`PROTOCOL.md`][protocol-md]
 in this repo for the normative DongLoRa Protocol v2 specification.
 
 [DongLoRa]: https://github.com/donglora
-[protocol-md]: https://github.com/donglora/protocol/blob/main/PROTOCOL.md
+[protocol-md]: https://github.com/donglora/protocol-rs/blob/main/PROTOCOL.md
 
 ## Install