(v3.7.0) - Maintenance and resolve dependencies with SB3 and numpy

[AlejandroCN7]

Description

This pull request introduces the final updates that make up the upcoming major release. It includes minor modifications, which are detailed in the changelog. The primary focus is on resolving the compatibility issue between SB3 and the latest versions of Numpy.

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)
• Documentation (update in the documentation)
• Improvement (of an existing feature)
• Others

Checklist:

• I've read the CONTRIBUTION guide (required)
• My change requires a change to the documentation.
• I have updated the tests.
• I have updated the documentation accordingly.
• I have reformatted the code using autopep8 second level aggressive.
• I have reformatted the code using isort.
• I have ensured cd docs && make spelling && make html pass (required if documentation has been updated.)
• I have ensured pytest tests/ -vv pass. (required).
• I have ensured pytype -d import-error sinergym/ pass. (required)

Changelog:

• gitignore: Add artifacts folder for wandb downloads.
• Update numpy version >2.0 in poetry.
• Update poetry.lock, updating all required packages and numpy 2.0 compatible with stable-baselines3 2.5.0 prerelease.