qt-creator: Fix header filename. #272

Job	Run time
build (windows-2019, windows, exe)	1m 22s
build (windows-2019, windows, exe)	36m 6s
build (windows-2019, windows-factory, exe)	1m 20s
build (windows-2019, windows-factory, exe)	35m 58s
build (ubuntu-20.04, linux, run)	1m 10s
build (ubuntu-20.04, linux, run)	23m 35s
build (macos-12, mac, dmg)	1m 30s
build (macos-12, mac, dmg)	37m 58s
build (ubuntu-20.04, linux-rpi, tar.gz)	1m 11s
build (ubuntu-20.04, linux-rpi, tar.gz)	22m 13s
stable-release	0s
stable-release	0s
development-release	0s
development-release	59s
	2h 43m 22s

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