chore: update Django to 4.2.16 for Redwood - Security Patch

[magajh]

See: openedx/wg-build-test-release#386

[openedx-webhooks]

Thanks for the pull request, @magajh!

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[cmltaWt0]

@magajh could you please check the CI fail? I've rerun failed jobs but w/o any luck.

[magajh]

@cmltaWt0 yess, I'm on it

[magajh]

@cmltaWt0 done!

[cmltaWt0]

Tested via loadl tutor build and launch.