Update README.md to reflect repo split and other developments

Author: PlasmaPower

README.md

@@ -1,15 +1,19 @@
-# Arbitrum Nitro Contracts
+# Arbitrum Nitro Rollup Contracts
 
 This is the package with the smart contract code that powers Arbitrum Nitro.
 It includes the rollup and fraud proof smart contracts, as well as interfaces for interacting with precompiles.
 
-For more information see https://developer.arbitrum.io/docs/public_nitro_devnet
+For more information see https://developer.arbitrum.io/intro
 
-Compile the contracts locally by running
+For the deployed addresses of these contracts for Arbitrum chains see https://developer.arbitrum.io/useful-addresses
+
+For the token bridge contracts see https://github.com/OffchainLabs/token-bridge-contracts
+
+Compile these contracts locally by running
 
 ```bash
-git clone https://github.com/offchainlabs/nitro
-cd nitro/contracts
+git clone https://github.com/offchainlabs/rollup-contracts
+cd rollup-contracts
 yarn install
 yarn build
 ```