resources: fix typo in square writeup

Change-Id: I06f4f312cf2faf9dd5b2305e5ac0b73d01ea05c1
Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5-resources/+/49967
Reviewed-by: Matt Sinclair <mattdsinclair@gmail.com>
Reviewed-by: Jason Lowe-Power <power.jg@gmail.com>
Maintainer: Matt Sinclair <mattdsinclair@gmail.com>
Maintainer: Jason Lowe-Power <power.jg@gmail.com>
Tested-by: Jason Lowe-Power <power.jg@gmail.com>
diff --git a/src/gpu/square/README.md b/src/gpu/square/README.md
index 104f434..26ec381 100644
--- a/src/gpu/square/README.md
+++ b/src/gpu/square/README.md
@@ -25,7 +25,7 @@
 
 A pre-built binary can be found at <http://dist.gem5.org/dist/v21-1/test-progs/square/square>.
 
-## Compiling GN3_X86/gem5.opt
+## Compiling GCN3_X86/gem5.opt
 
 The test is run with the GCN3_X86 gem5 variant, compiled using the gcn-gpu docker image: