fix: demos on win #2148

Job	Run time
call-check-pr-status / check_pr_status	6s
build (gcc, debug, x64)	4m 46s
build (gcc, debug, x86)	1s
build (gcc, release, x64)	1s
build (clang, release, x64)	10m 12s
build (gcc, release, x86)	1s
build (clang, debug, x64)	10m 12s
test-integration-cpp	1s
test-integration-nodejs	1s
test-integration-python	1s
test-integration-go	1s
test-integration-ten-manager	1s
test-standalone	1s
	25m 25s

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