chore: sync generated API SDKs (#61)

<!-- pplx-workflow-pr-id: public-sdk-sync/perplexity-node -->

Sync generated API SDK contracts from
`ppl-ai/agi@255a48bab3cbd9748dc6a4819d378d05a555338e`.

Co-authored-by: github-actions[bot] <github-actions[bot]@users.noreply.github.com>

Author: pplx-oss