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.

• astroid changes from 3.3.9 to 3.3.10
• certifi changes from 2025.1.31 to 2025.6.15
• charset-normalizer changes from 3.4.1 to 3.4.2
• click changes from 8.1.8 to 8.2.1
• coverage[toml] changes from 7.8.0 to 7.9.1
• diff-cover changes from 9.2.4 to 9.3.2
• django changes from 4.2.20 to 4.2.23
• edx-i18n-tools changes from 1.7.0 to 1.9.0
• platformdirs changes from 4.3.7 to 4.3.8
• pluggy changes from 1.5.0 to 1.6.0
• pylint changes from 3.3.6 to 3.3.7
• pyproject-api changes from 1.9.0 to 1.9.1
• pytest changes from 8.3.5 to 8.4.0
• pytest-cov changes from 6.1.1 to 6.2.1
• requests changes from 2.32.3 to 2.32.4
• tomlkit changes from 0.13.2 to 0.13.3
• tox changes from 4.25.0 to 4.26.0
• typing-extensions changes from 4.13.2 to 4.14.0
• virtualenv changes from 20.30.0 to 20.31.2

[edx-requirements-bot]

These Packages need manual review..

• [MAJOR] cachetools changes from 5.5.2 to 6.0.0
• [MAJOR] doc8 changes from 1.1.2 to 2.0.0
• [NEW] pygments (2.19.1) added to the requirements
• [MAJOR] setuptools changes from 79.0.0 to 80.9.0
• [MAJOR] snowballstemmer changes from 2.2.0 to 3.0.1

[edx-requirements-bot]

Closing obsolete PR.