west.yml: update zephyr to 9f4bd38ef7d3 #15185

	---

	# https://thesofproject.github.io/latest/developer_guides/unit_tests.html

	name: Unit tests

	# 'workflow_dispatch' allows running this workflow manually from the
	# 'Actions' tab

	# yamllint disable-line rule:truthy
	on: [pull_request, workflow_dispatch, workflow_call]

	jobs:
	cmocka_utests:
	runs-on: ubuntu-latest
	steps:
	- uses: actions/checkout@v4
	with: {fetch-depth: 2, filter: 'tree:0'}

	- name: build and run all defconfigs
	run: ./test/test-all-defconfigs.sh

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