Switch from deprecated u2004 to u2204 image for github actions

[nzlosh]

No description provided.

[cognifloyd]

Bummer. Like like this repo needs to switch to pytest:

st2-rbac-backend/Makefile

Lines 131 to 145 in 17609e7

	.PHONY: .unit-tests
	.unit-tests:
	@echo
	@echo "==================== unit-tests ===================="
	@echo
	. $(VIRTUALENV_DIR)/bin/activate; nosetests $(NOSE_OPTS) -s -v tests/unit/
	. $(VIRTUALENV_DIR)/bin/activate; nosetests $(NOSE_OPTS) -s -v tests/unit/controllers/api/v1/
	. $(VIRTUALENV_DIR)/bin/activate; nosetests $(NOSE_OPTS) -s -v tests/unit/controllers/stream/v1/
	.PHONY: .integration-tests
	.integration-tests:
	@echo
	@echo "==================== integration-tests ===================="
	@echo
	. $(VIRTUALENV_DIR)/bin/activate; nosetests $(NOSE_OPTS) -s -v tests/integration/