website: Fix GCN3 'Running the Sample Application' script

Change-Id: I022b9361bfc832ebc0e5ae323f1eb6558a2b40a1
Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5-website/+/50807
Reviewed-by: Bobby R. Bruce <bbruce@ucdavis.edu>
Maintainer: Bobby R. Bruce <bbruce@ucdavis.edu>
Tested-by: Bobby R. Bruce <bbruce@ucdavis.edu>
diff --git a/_pages/documentation/general_docs/gpu_models/gcn3.md b/_pages/documentation/general_docs/gpu_models/gcn3.md
index 15b9eb3..7ca36bf 100644
--- a/_pages/documentation/general_docs/gpu_models/gcn3.md
+++ b/_pages/documentation/general_docs/gpu_models/gcn3.md
@@ -55,12 +55,13 @@
 
 #### Running the sample application
 The following command assumes that gem5 and gem5-resources are subdirectories of your current directory
+
 ```
 docker run --rm -v $PWD/gem5:/gem5 -v $PWD/gem5-resources:/gem5-resources \
                 -w /gem5 <image_name> \
-                build/GCN3_X86/gem5.opt configs/example/apu_se.py -n2 \
-                --benchmark-root=/gem5-resources/src/square/bin \
-                -c square.o
+                build/GCN3_X86/gem5.opt configs/example/apu_se.py -n3 \
+                --benchmark-root=/gem5-resources/src/gpu/square/bin \
+                -c square
 ```
 
 ## **ROCm**