Fixing depracated polkadot repository

README.md

@@ -204,7 +204,7 @@ See also [Rust — Production](https://www.rust-lang.org/production) organizatio
 * [opensea-rs](https://github.com/gakonst/opensea-rs) - Rust bindings & CLI to the Opensea API and Contracts.
 * [Parity-Bitcoin](https://github.com/paritytech/parity-bitcoin) — The Parity Bitcoin client
 * [Phala-Network/phala-blockchain](https://github.com/Phala-Network/phala-blockchain) — Confidential smart contract blockchain based on Intel SGX and Substrate
-* [Polkadot](https://github.com/paritytech/polkadot) — Heterogeneous multi‑chain technology with pooled security
+* [polkadot-sdk](https://github.com/paritytech/polkadot-sdk) — The Parity Polkadot Blockchain SDK
 * [revm](https://github.com/bluealloy/revm) - Revolutionary Machine (revm) is a fast Ethereum virtual machine written in rust.
 * [rust-bitcoin](https://github.com/rust-bitcoin/rust-bitcoin) — Library with support for de/serialization, parsing and executing on data structures and network messages related to Bitcoin.
 * [rust-lightning](https://github.com/lightningdevkit/rust-lightning) [![Crate](https://img.shields.io/crates/v/lightning.svg?logo=rust)](https://crates.io/crates/lightning) — Bitcoin Lightning library written in Rust. The main crate,`lightning`, does not handle networking, persistence, or any other I/O. Thus,it is runtime-agnostic, but users must implement basic networking logic, chain interactions, and disk storage.po on linking crate.