pip: update black requirement from ~=25.12.0 to ~=26.1.0 in the pip-updates group #399

Job	Run time
unit_tests / Tox unit tests and linting (3.12)	1m 23s
unit_tests / Tox unit tests and linting (3.13)	1m 25s
lint / lint	15s
fail_on_remote	2s
publish_artifacts / Build and push images	4m 25s
publish_artifacts / Build and push Helm chart	29s
run_azimuth_tests	33m 9s
	41m 8s

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