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 4.3.3 to 4.3.4
• boto3 changes from 1.43.108 to 1.43.111
• botocore changes from 1.43.108 to 1.43.111
• cachetools changes from 7.2.0 to 7.2.1
• django - python_full_version < '3.13' changes from 5.2.17 to 5.2.18
• django - python_full_version >= '3.13' changes from 5.2.17 to 5.2.18
• dnspython changes from 2.8.0 to 2.9.0
• filelock changes from 4.0.10 to 4.1.0
• iniconfig changes from 2.3.0 to 2.3.1
• platformdirs changes from 4.12.3 to 4.12.4
• pymongo changes from 4.18.2 to 4.18.3
• pyproject-api changes from 1.11.3 to 1.11.5
• python-discovery changes from 1.6.1 to 1.6.2
• python-slugify changes from 9.1.2 to 9.1.3
• pytz changes from 2026.4 to 2026.5
• tox changes from 4.64.8 to 4.65.2
• uv changes from 0.12.23 to 0.13.0
• virtualenv changes from 21.14.5 to 21.14.6
• xblock changes from 6.3.3 to 6.3.4