Blast API shutting down after Oct 31

Hey,

[Blast API](https://blastapi.io/) is shutting down after Oct 31, 2025. You might want to update [this reference](https://github.com/philogicae/lfgho-hackathon-ghoticket/blob/main/app/layout.tsx#L85) to another RPC provider, for example [Chainstack](https://chainstack.com).