Bump actions/download-artifact from 3 to 4.1.7 in /.github/workflows #20

Job	Run time
Extra_tests (py38-tf2.13, ubuntu-latest, 18, 1.16.3, 1.16.1, False)	9m 45s
Test_max_py_with_latest_tf	9m 34s
Test_min_py_with_min_tf	9m 39s
Extra_tests (py38-tf2.13, ubuntu-latest, 15, 1.16.3, 1.16.1, False)	9m 48s
Extra_tests (py38-tf2.13, windows-2022, 18, 1.16.3, 1.16.1, False)	13m 7s
Extra_tests (py38-tf2.13, windows-2022, 15, 1.16.3, 1.16.1, False)	12m 26s
Extra_tests (py39-tf2.15, ubuntu-latest, 18, 1.16.3, 1.16.1, False)	9m 27s
Extra_tests (py39-tf2.15, ubuntu-latest, 15, 1.16.3, 1.16.1, False)	9m 26s
Extra_tests (py39-tf2.15, windows-2022, 18, 1.16.3, 1.16.1, False)	11m 50s
Extra_tests (py39-tf2.15, windows-2022, 15, 1.16.3, 1.16.1, False)	13m 32s
Extra_tests (py37-tf1.15, ubuntu-latest, 15, 1.14.1, 1.14.1, True, 1.15.5, 3.7)	3m 17s
Publish Tests Results to Github	12s
	1h 52m 3s

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