Bumped django-storages from 1.12.3 to 1.13.2

[vanbuiten]

Description

Bumped django-storages from 1.12.3 to 1.13.2

In version 1.13.2 an issue with uploading files and the use of AZURE_CUSTOM_DOMAIN has been fixed, more info about this bug can be found on jschneier/django-storages#1116

Checklist

• Keep the PR, and the amount of commits to a minimum
• The commit messages are meaningful and descriptive
• The change/fix is well documented, particularly in hard-to-understand areas of the code / unit tests
• Are there any breaking changes in the code, if so are they discussed and did the team agreed to these changes
• Check that the branch is based on main and is up to date with main
• Check that the PR targets main
• There are no merge conflicts and no conflicting Django migrations

How has this been tested?

• Tested the change/fix locally and all unit tests still pass
• Code coverage is at least 85% (the higher the better)
• No iSort, Flake8 and SPDX issues are present in the code