build: lock langchain-core to version 0.2.30.

[ogabrielluiz]

Lock langchain-core version until they fix a missing import in https://github.com/langchain-ai/langchain/blob/dc80be5efe70f13947169f37e4abe17ba54c8137/libs/core/langchain_core/tools/__init__.py.

[github-actions]

Pull Request Validation Report

This comment is automatically generated by Conventional PR

Whitelist Report

Whitelist	Active	Result
Pull request is a draft and should be ignored	✅	❌
Pull request is made by a whitelisted user and should be ignored	❌	❌
Pull request is submitted by a bot and should be ignored	✅	❌
Pull request is submitted by administrators and should be ignored	❌	❌

Result

Pull request does not satisfy any enabled whitelist criteria. Pull request will be validated.

Validation Report

Validation	Active	Result
All commits in this pull request has valid messages	❌	✅
Pull request does not introduce too many changes	❌	✅
Pull request has a valid title	✅	✅
Pull request has mentioned issues	❌	✅
Pull request has valid branch name	❌	✅
Pull request should have a non-empty body	✅	❌

Result

Pull request is invalid.

Reason

• Pull request must have a non-empty body

_{Last Modified at 14 Aug 24 20:16 UTC}