cmake Qt6Concurrent examples

qt/qtbase tests/auto/cmake/test_concurrent_module/CMakeLists.txt :9

find_package(Qt6Concurrent 6.0.0 REQUIRED)

libfive/libfive studio/CMakeLists.txt :23

find_package(Qt6Concurrent REQUIRED)

pyushkevich/itksnap CMake/standalone.cmake :112

FIND_PACKAGE(Qt6Concurrent)