docs: Update number of concurrent connections for uWSGI

[NoaFayn]

Description

Changed the stated number of concurrent connections handled bb uWSGI by default.

Assuming the default values for DD_UWSGI_NUM_OF_PROCESSES and DD_UWSGI_NUM_OF_THREADS stated is correct (4 for both), then the number of concurrent connections should be 4*4 or 16. But the documentation indicates only 4.

Some resources:

• https://dev.to/devaaai/guide-to-tuning-your-uwsgi-server-for-optimal-performance-32oj
• https://serverfault.com/a/542723

I first discussed this on Slack.

Test results

Haven't run the tests as the PR is really simple.

Documentation

This is the point of this PR.

Checklist

This checklist is for your information.

• Make sure to rebase your PR against the very latest dev.
• Features/Changes should be submitted against the dev.
• Bugfixes should be submitted against the bugfix branch.
• Give a meaningful name to your PR, as it may end up being used in the release notes.
• Your code is flake8 compliant.
• Your code is python 3.13 compliant.
• If this is a new feature and not a bug fix, you've included the proper documentation in the docs at https://github.com/DefectDojo/django-DefectDojo/tree/dev/docs as part of this PR.
• Model changes must include the necessary migrations in the dojo/db_migrations folder.
• Add applicable tests to the unit tests.
• Add the proper label to categorize your PR.

~docs

[valentijnscholten]

Thanks for double checking this, all help is welcome on the project :-)

[mtesauro]

Approved