fix README.md

Author: nnsW3

hackathons/README.md

@@ -64,4 +64,4 @@ When you are ready to submit your project, please provide:
 | ZKvote.cc            | [project](https://ethglobal.com/showcase/zkvote-cc-rsvkt)            | To address the challenges of cross-chain voting, our protocol integrates Voting tokens with standard ERC-20 via bridge, processes voting off-chain, and employs ZK proofs for secure L2 State transfer. This ensures compatibility with existing bridge architectures. | ETHIstanbul |
 | Pepe's Computation   | [project](https://ethglobal.com/showcase/pepes-computation-q2v90)    | Moving from a centralized gaming industry to a decentralized future in which individuals can shape the roadmap games are taking. "Pepe's Party Computation" uses zk-SNARKS and two-party computation to solve trustless self-policing and decentralized fog-of-war     | ETHIstanbul |
 | Sarma+EVM=ZKEVM,PEXC | [project](https://ethglobal.com/showcase/sarma-evm-zkevm-pexc-9wp7o) | Sarma: simple primitive to achieve private execution on EVM, even cross-chain.                                                                                                                                                                                         | ETHIstabul  |
-| Vitalik's Secret     | [project](https://ethglobal.com/showcase/vitaliks-secret-ajwsw)      | A world scale puzzle that challenge anyone to find the best solution. It is a NP-hard problem so rife for exploration                                                                                                                                                  | ETHIstanbul |
+| Vitalik's Secret     | [project](https://ethglobal.com/showcase/vitaliks-secret-ajwsw)      | A world-scale puzzle that challenge anyone to find the best solution. It is a NP-hard problem so rife for exploration                                                                                                                                                  | ETHIstanbul |