Fix qt dir

Author: andrewrabert

.github/workflows/build-windows.yml

@@ -62,7 +62,7 @@ jobs:
         call "C:\Program Files\Microsoft Visual Studio\2022\Enterprise\VC\Auxiliary\Build\${{ matrix.vcvars }}"
         cd build
         set PATH=%PATH%;C:\Program Files (x86)\WiX Toolset v3.11\bin;%CD%
-        cmake -GNinja -DCMAKE_BUILD_TYPE=RelWithDebInfo -DCMAKE_INSTALL_PREFIX=output -DCMAKE_MAKE_PROGRAM=ninja.exe -DQTROOT=%Qt6_DIR% -DMPV_INCLUDE_DIR=mpv/include -DMPV_LIBRARY=mpv/libmpv-2.dll -DCHECK_FOR_UPDATES=ON -DUSE_STATIC_MPVQT=ON ..
+        cmake -GNinja -DCMAKE_BUILD_TYPE=RelWithDebInfo -DCMAKE_INSTALL_PREFIX=output -DCMAKE_MAKE_PROGRAM=ninja.exe -DQTROOT=%QT_ROOT_DIR% -DMPV_INCLUDE_DIR=mpv/include -DMPV_LIBRARY=mpv/libmpv-2.dll -DCHECK_FOR_UPDATES=ON -DUSE_STATIC_MPVQT=ON ..
         lib /def:mpv\mpv.def /out:mpv\libmpv-2.dll.lib /MACHINE:${{ matrix.machine }}
         ninja
         mkdir output 2>nul