updated readme to 7.4

Author: Felix Igelbrink

README.md

@@ -1,6 +1,6 @@
 # Python-OptiX
 
-Python wrapper for the OptiX 7.3 raytracing engine.
+Python wrapper for the OptiX 7 raytracing engine.
 
 Python-OptiX wraps the OptiX C++ API using Cython and provides a simplified 
 interface to the original C-like API using mainly the 
@@ -12,16 +12,18 @@ Only Linux is supported at the moment.
 
 ### OptiX Versions
 
-Python-OptiX currently only supports the most recent (7.3.0) release of OptiX
+Python-OptiX currently supports the OptiX releases 7.3.0 and 7.4.0
 
 ## Installation
 
 ### Dependencies
 
 Install a recent version of the [CUDA Toolkit](https://developer.nvidia.com/cuda-downloads)
-and the [OptiX 7.3.0 SDK](https://developer.nvidia.com/optix/downloads/7.3.0/linux64)
+and the [OptiX 7.4.0 SDK](https://developer.nvidia.com/optix/downloads/7.4.0/linux64-x86_64)
 
-Make sure the CUDA header files are installed as well
+Note: The older [OptiX 7.3.0 SDK](https://developer.nvidia.com/optix/downloads/7.4.0/linux64-x86_64) version is supported as well.
+
+Make sure the CUDA header files are installed as well.
 
 Add the locations of CUDA and OptiX to the system `PATH` variable if necessary.