chore: fix typo in test/unit/sanityCheck.test.ts hiding root cause of error#8548

MattHandzel wants to merge 1 commit intoChainSafe:unstableChainSafe/lodestar:unstablefrom

MattHandzel:matthandzel/fixing-typo-in-sanity-check-testMattHandzel/lodestar:matthandzel/fixing-typo-in-sanity-check-testCopy head branch name to clipboard