Update actions/download-artifact digest to 3e5f45b #163

Job	Run time
Checkout JUnit reports	33s
Checkout JUnit reports with non-existent branch	16s
Generate split indexes	4s
Test #1	1m 13s
Test #3	1m 33s
Test #0	1m 33s
Test #2	1m 22s
Merge JUnit reports with existing branch	19s
Merge JUnit reports with new branch	21s
	7m 14s

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