docs: fix git URL in README.md#1

hyperfinitism wants to merge 1 commit intotiktok-privacy-innovation:maintiktok-privacy-innovation/trustless-attestation-verification-risczero:mainfrom

hyperfinitism:docs/fix-readme-git-urlhyperfinitism/trustless-attestation-verification-risczero:docs/fix-readme-git-urlCopy head branch name to clipboard