Fix quoting of `$TMPDIR` in NCBI FCS-GX #15674

Job	Run time
Setup cache and determine changed repositories (3.11)	1m 29s
Lint tool-list (3.11)	54s
Lint R scripts (ubuntu-20.04, release)	1m 33s
Check file sizes	45s
Lint Python scripts (3.11)	27s
Test tools (0, 3.11)	3m 24s
Combine chunked test results (3.11)	32s
Check workflow success	1s
Deploy	0s
Report deploy status	0s
	9m 5s

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