Update docs/software/communication/cray-mpich.md

Co-authored-by: Mikael Simberg <[email protected]>

Author: simonpintarelli

docs/software/communication/cray-mpich.md

@@ -81,7 +81,7 @@ Performance may be negatively affected by this option.
 
 #### `"cxil_map: write error"` when doing inter-node GPU-aware MPI communication
 
-The following environment variable can be set to disable gdrcopy:
+The following environment variable can be set to disable GPUDirect:
 ```bash
 export FI_CXI_SAFE_DEVMEM_COPY_THRESHOLD=0
 ```