chore: Upgrade Python requirements

[edx-requirements-bot]

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

Deleted obsolete pull_requests:
#505

[edx-requirements-bot]

List of packages in the PR without any issue.

• boto3 changes from 1.43.2 to 1.43.14
• botocore changes from 1.43.2 to 1.43.14
• cachetools changes from 7.1.0 to 7.1.4
• certifi changes from 2026.4.22 to 2026.5.20
• click changes from 8.3.3 to 8.4.1
• coverage[toml] changes from 7.13.5 to 7.14.0
• django changes from 5.2.13 to 5.2.14
• idna changes from 3.13 to 3.16
• lxml changes from 6.1.0 to 6.1.1
• markdown-it-py changes from 4.0.0 to 4.2.0
• pip changes from 26.1 to 26.1.1
• pytest-rerunfailures changes from 16.1 to 16.3
• python-discovery changes from 1.2.2 to 1.3.1
• pytz changes from 2026.1.post1 to 2026.2
• requests changes from 2.33.1 to 2.34.2
• stevedore changes from 5.7.0 to 5.8.0
• tomlkit changes from 0.14.0 to 0.15.0
• tox changes from 4.53.1 to 4.54.0
• urllib3 changes from 2.6.3 to 2.7.0
• virtualenv changes from 21.3.0 to 21.3.3