fix(deps): update dependency edx-django-utils to v5.16.0

[renovate]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
edx-django-utils	5.14.2 -> 5.16.0

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Release Notes

openedx/edx-django-utils (edx-django-utils)

v5.16.0

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Added

* Added a new method to backends for ``tag_root_span_with_error`` and added Datadog implementation of the functionality.
* Uses the new method to tag the root span when processing exceptions.

Changed

• Renamed CachedCustomMonitoringMiddleware to MonitoringSupportMiddleware and deprecated the old name. It will be removed in a future release.

v5.15.0

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Added

* Added Datadog implementation of ``function_trace`` and allowed implementation to be configurable.

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