Fix Qt5-Qt6 coinstall #51

Job	Run time
build (ubuntu-22.04, Debug, static, 5.15)	3m 26s
build (ubuntu-22.04, Debug, static, 6.5.*)	5m 6s
build (ubuntu-22.04, Debug, shared, 5.15)	3m 29s
build (ubuntu-22.04, Debug, shared, 6.5.*)	5m 7s
build (ubuntu-22.04, Release, static, 5.15)	1m 14s
build (ubuntu-22.04, Release, static, 6.5.*)	1m 28s
build (ubuntu-22.04, Release, shared, 5.15)	1m 6s
build (ubuntu-22.04, Release, shared, 6.5.*)	1m 34s
build (windows-2022, Debug, static, 5.15)	14m 44s
build (windows-2022, Debug, static, 6.5.*)	16m 34s
build (windows-2022, Debug, shared, 5.15)	14m 41s
build (windows-2022, Debug, shared, 6.5.*)	17m 18s
build (windows-2022, Release, static, 5.15)	2m 14s
build (windows-2022, Release, static, 6.5.*)	2m 13s
build (windows-2022, Release, shared, 5.15)	1m 36s
build (windows-2022, Release, shared, 6.5.*)	2m 48s
build (macos-12, Debug, static, 5.15)	3m 1s
build (macos-12, Debug, static, 6.5.*)	5m 4s
build (macos-12, Debug, shared, 5.15)	6m 22s
build (macos-12, Debug, shared, 6.5.*)	6m 27s
build (macos-12, Release, static, 5.15)	1m 26s
build (macos-12, Release, static, 6.5.*)	3m 5s
build (macos-12, Release, shared, 5.15)	1m 17s
build (macos-12, Release, shared, 6.5.*)	2m 53s
	2h 4m 13s

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