Update dependency jiti to v1

Editor assessment

The subject identifies the exact dependency and its new major — jiti to v1 — satisfying clarity without guesswork. The chore(deps) classification is correct, the imperative verb is clean, and the Co-authored-by trailer is grammatical and meaningful. The bodyless form is acceptable and permitted for a routine bump, and no footer is required since nothing breaks. What the transition out of the 0.x line means for the runtime loader is left to release notes, which is the standard information gap for automated bumps and holds this tidy, correct message at good.