Change keyspace repository location to base-org/keyspace

Testnet Beta

The Testnet Beta (v0.0.2) release of Keyspace introduces [`keyspace-client`](https://github.com/base-org/keyspace-client), an example TypeScript client for Keyspace with an integrated smart wallet, and [`keyspace-recovery-service`](https://github.com/base-org/keyspace-recovery-service), an RPC service for generating SNARK proofs of the signatures users sign to change their keys. The supported chains have been expanded from Base Sepolia and Optimism Sepolia to include Arbitrum Sepolia, Gnosis Chiado, Polygon Amoy, BSC Testnet, and Avalanche Fuji.