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.

• boto3 changes from 1.43.40 to 1.43.46
• botocore changes from 1.43.40 to 1.43.46
• build changes from 1.5.0 to 1.5.1
• charset-normalizer changes from 3.4.7 to 3.4.9
• django changes from 5.2.15 to 5.2.16
• filelock changes from 3.29.5 to 3.29.7
• pylint-django changes from 2.7.0 to 2.8.0
• python-discovery changes from 1.4.3 to 1.4.4
• s3transfer changes from 0.19.0 to 0.19.1
• tox changes from 4.56.1 to 4.56.4
• tzdata changes from 2026.2 to 2026.3
• virtualenv changes from 21.5.1 to 21.6.1
• xblock[django] changes from 6.3.0 to 6.3.1