bench: use string interpolation in `stats/base/ndarray/dmskmax` #19495

Job	Run time
Manage labels	-1s
Rebase this PR on top of develop branch	0s
Update copyright header years	-1s
Merge changes from develop branch into this PR	-1s
Auto-fix lint errors	-1s
Check for required files	0s
Remove in-progress label	0s
	-4s

Provide feedback