Update grace.md

docs.it4i/cs/guides/grace.md

 # Using NVIDIA Grace Partition
 
-For testing your application on the IBM Power partition,
+For testing your application on the NVIDIA Grace Partition,
 you need to prepare a job script for that partition or use the interactive job:
 
 ```console
@@ -283,4 +283,4 @@ ml NVHPC
 [1]: https://www.nvidia.com/en-us/data-center/grace-cpu-superchip/
 [2]: https://developer.nvidia.com/hpc-sdk
 [3]: https://developer.nvidia.com/grace/clang
-[4]: https://docs.nvidia.com/nvpl
\ No newline at end of file
+[4]: https://docs.nvidia.com/nvpl