test: fix test-cli-syntax assertions on windows
The test introduced in a5f91ab2 accidentally introduced failures on some windows builds. Update the assertion that was causing the failures.
Ref: https://github.com/nodejs/node/pull/11689
Checklist
-
make -j4 test
(UNIX), orvcbuild test
(Windows) passes -
commit message follows commit guidelines
Affected core subsystem(s)
test