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This code does not have any dependencies that are specific to any specific version of ubuntu. So instead of testing on a specific version and then needing to do work to keep the versions up-to-date, we switch to the ubuntu-latest target which should be sufficient for testing purposes. This work is being done as a part of https://github.com/openedx/platform-roadmap/issues/377 closes https://github.com/openedx/frontend-app-ora-grading/issues/345