VulkanUnitTests: Fix bad comment on assembly.

This has caught me out several times now. Time to fix it.

Bug: b/126871859
Change-Id: Ia6fa46404ea89e55311721e4be6e37b7a94f1cd3
Reviewed-on: https://swiftshader-review.googlesource.com/c/SwiftShader/+/38916
Kokoro-Presubmit: kokoro <noreply+kokoro@google.com>
Reviewed-by: Chris Forbes <chrisforbes@google.com>
Tested-by: Ben Clayton <bclayton@google.com>
diff --git a/tests/VulkanUnitTests/unittests.cpp b/tests/VulkanUnitTests/unittests.cpp
index 64eadbb..e7b954b 100644
--- a/tests/VulkanUnitTests/unittests.cpp
+++ b/tests/VulkanUnitTests/unittests.cpp
@@ -524,7 +524,7 @@
         "%19 = OpAccessChain %16 %2 %13\n"      // &gl_GlobalInvocationId.x

         "%20 = OpLoad %10 %19\n"                // gl_GlobalInvocationId.x

         "%21 = OpAccessChain %17 %6 %12 %20\n"  // &in.arr[gl_GlobalInvocationId.x]

-        "%22 = OpLoad %9 %21\n"                 // out.arr[gl_GlobalInvocationId.x]

+        "%22 = OpLoad %9 %21\n"                 // in.arr[gl_GlobalInvocationId.x]

         "%23 = OpAccessChain %17 %5 %12 %20\n"  // &out.arr[gl_GlobalInvocationId.x]

               "OpStore %23 %22\n"               // out.arr[gl_GlobalInvocationId.x] = in[gl_GlobalInvocationId.x]

               "OpReturn\n"