Update snapatac2 to 2.6.4 (#6157) #146

Job	Run time
Setup cache and determine changed repositories (3.11)	5m 29s
Lint R scripts (ubuntu-20.04, release)	1m 33s
Lint tool-list (3.11)	1m 14s
Lint Python scripts	0s
Test tools (0, 3.11)	35m 1s
Test tools (1, 3.11)	11m 43s
Test tools (2, 3.11)	7m 0s
Check file sizes	0s
Test tools (3, 3.11)	31m 24s
Combine chunked test results (3.11)	40s
Deploy	0s
Check workflow success	0s
Report deploy status	0s
	1h 34m 4s

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