Use imported target for Threads

Signed-off-by: Nicolas Fella <nicolas.fella@gmx.de>

src/gui/CMakeLists.txt

@@ -385,7 +385,7 @@ if(WITH_CRASHREPORTER)
 
     if(UNIX AND NOT MAC)
         find_package(Threads REQUIRED)
-        target_link_libraries(nextcloudCore PUBLIC ${CMAKE_THREAD_LIBS_INIT})
+        target_link_libraries(nextcloudCore PUBLIC Threads::Threads)
     endif()
 endif()