Update CMakeLists.txt

code/CMakeLists.txt

@@ -1014,7 +1014,7 @@ ENDIF()
 # Check dependencies for glTF importer with Open3DGC-compression.
 # RT-extensions is used in "contrib/Open3DGC/o3dgcTimer.h" for collecting statistics. Pointed file
 # has implementation for different platforms: WIN32, __MACH__ and other ("else" block).
-FIND_PACKAGE(rt QUIET)
+FIND_PACKAGE(RT QUIET)
 IF (NOT ASSIMP_HUNTER_ENABLED AND (RT_FOUND OR MSVC))
   SET( ASSIMP_IMPORTER_GLTF_USE_OPEN3DGC 1 )
   ADD_DEFINITIONS( -DASSIMP_IMPORTER_GLTF_USE_OPEN3DGC=1 )