CMakeLists.txt: Remove -Wunqualified-std-cast-call #7

Job	Run time
Sigrok artifact builder / PulseView macOS build for ARM	4m 46s
Sigrok artifact builder / PulseView AppImage build (x86_64) (Release)	6m 8s
Sigrok artifact builder / PulseView macOS build for x86	8m 6s
Sigrok artifact builder / PulseView AppImage build (x86_64) (Debug)	5m 50s
Sigrok artifact builder / PulseView MXE build (i686) (Release)	5m 20s
Sigrok artifact builder / sigrok-cli AppImage build (${{ matrix.target.target }})	0s
Sigrok artifact builder / PulseView MXE build (i686) (Debug)	7m 32s
Sigrok artifact builder / PulseView MXE build (x86_64) (Release)	7m 12s
Sigrok artifact builder / sigrok-cli macOS build for ARM	0s
Sigrok artifact builder / sigrok-cli macOS build for x86	0s
Sigrok artifact builder / PulseView MXE build (x86_64) (Debug)	10m 40s
Sigrok artifact builder / sigrok-cli MXE build (${{ matrix.target.target }})	0s
Sigrok artifact builder / Debug output	1s
Sigrok artifact builder / Announce sigrok-cli builds in PR	0s
Sigrok artifact builder / Create continuous sigrok-cli release and add artifacts to it	0s
Sigrok artifact builder / Create continuous PulseView release and add artifacts to it	12s
Sigrok artifact builder / Announce PV builds in PR	0s
Sigrok artifact builder / Create continuous release and add artifacts to it	0s
	55m 47s

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