Bump datumaro 1.6.1rc2 #6521

Job	Run time
Code-Quality-Checks	4m 1s
Coverage-Test	22m 11s
Unit-Test-with-Python3.9 / run_tests_in_tox	21m 58s
Integration-Test-py310-act / run_tests_in_tox	11m 58s
Integration-Test-py310-all / run_tests_in_tox	10m 39s
Integration-Test-py310-cls / run_tests_in_tox	44m 49s
Integration-Test-py310-ano / run_tests_in_tox	22m 3s
Integration-Test-py310-iseg / run_tests_in_tox	39m 57s
Integration-Test-py310-det / run_tests_in_tox	1h 26m 13s
Integration-Test-py310-seg / run_tests_in_tox	14m 21s
Integration-Test-py310-visprompt / run_tests_in_tox	10m 51s
	4h 49m 1s

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