chore: fix tool.lint.ruff in pyproject.toml

[nobu007]

Fix setting in pyproject.toml.

• tool.ruff -> tool.lint.ruff
• ruff version = 0.4.1.

This PR resolve Warnings

result(before).

langchain-google$ ruff formatruff format
warning: The top-level linter settings are deprecated in favour of their counterparts in the `lint` section. Please update the following options in `langchain-google/libs/genai/pyproject.toml`:
  - 'select' -> 'lint.select'
warning: The top-level linter settings are deprecated in favour of their counterparts in the `lint` section. Please update the following options in `langchain-google/libs/community/pyproject.toml`:
  - 'select' -> 'lint.select'
warning: The top-level linter settings are deprecated in favour of their counterparts in the `lint` section. Please update the following options in `langchain-google/libs/vertexai/pyproject.toml`:
  - 'select' -> 'lint.select'
4 files reformatted, 122 files left unchanged

result(before).

langchain-google$ ruff format
52 files reformatted, 74 files left unchanged

[lkuligin]

/gcbrun

[lkuligin]

/gcbrun

[lkuligin]

/gcbrun