chore: Upgrade Python requirements

[edx-requirements-bot]

Python requirements update. Please review the changelogs for the upgraded packages.

[edx-requirements-bot]

List of packages in the PR without any issue.

• celery changes from 5.6.0 to 5.6.2
• diff-cover changes from 10.0.0 to 10.1.0
• filelock changes from 3.20.1 to 3.20.2
• kombu changes from 5.6.1 to 5.6.2
• librt changes from 0.7.5 to 0.7.7
• psutil changes from 7.2.0 to 7.2.1
• pylint-django changes from 2.6.1 to 2.7.0
• pynacl changes from 1.6.1 to 1.6.2
• tox changes from 4.32.0 to 4.33.0

[edx-requirements-bot]

These Packages need manual review..

• [MAJOR] astroid changes from 3.3.11 to 4.0.3
• [MAJOR] certifi changes from 2025.11.12 to 2026.1.4
• [REMOVED] exceptiongroup (1.3.1) removed from the requirements
• [MAJOR] isort changes from 6.1.0 to 7.0.0
• [MAJOR] pylint changes from 3.3.9 to 4.0.4