Re: [PATCH 1/7] scalar: use "$GIT_UNZIP" in 'scalar diagnose' test

"Victoria Dye via GitGitGadget" [off-list ref] writes:

From: Victoria Dye <redacted>

Use the "$GIT_UNZIP" test variable rather than verbatim 'unzip' to unzip the
'scalar diagnose' archive. Using "$GIT_UNZIP" is needed to run the Scalar
tests on systems where 'unzip' is not in the system path.

Makes sense.  It makes it more in line with how a handful of tests
in t/ already use the zip archive.