chore(security): bump h11, idna, orjson, requests, urllib3, pytest in langchain/uv.lock (#10)

Lockfile-only scoped regeneration (uv lock --upgrade-package ...) clearing 12
advisories found by a local pip-audit run. No pyproject.toml constraint changes.

Co-authored-by: Claude Opus 5 (1M context) <noreply@anthropic.com>

Author: benfrank241