Release v2.6.9

What's Changed

• fix: remove partial_update check for default value validation by @shanghaikid in #488
• fix: remove partial_update check for default value validation by @shanghaikid in #489
• chore(deps): bump @langchain/core from 1.0.5 to 1.1.8 in /examples/LangChain by @dependabot[bot] in #490
• chore(deps): bump langchain from 1.0.4 to 1.2.3 in /examples/LangChain by @dependabot[bot] in #491
• chore(deps): bump js-yaml from 3.14.1 to 3.14.2 by @dependabot[bot] in #492

Full Changelog: v2.6.8...v2.6.9