fix typo in script to cancel WUs #4833

Job	Run time
libs-build	5m 34s
apps-build	9m 45s
libs-cmake-build	7m 8s
client-armv6-build	3m 1s
client-arm-build	3m 21s
client-arm64-build	3m 20s
client-x86-build	3m 6s
client-x86_64-build	3m 6s
manager-build (assembleRelease)	4m 18s
manager-build (assembleXiaomi_release)	3m 59s
manager-build (assembleArmv6_release)	3m 54s
manager-build (jacocoTestReportDebug)	6m 12s
	56m 44s

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