resources: update DNNMark yaml data

Update yaml data for DNNMark to mirror Square.

Change-Id: I904db95c05e14c955964d3396efd925b08695d77
Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5-resources/+/47501
Maintainer: Matt Sinclair <mattdsinclair@gmail.com>
Reviewed-by: Jason Lowe-Power <power.jg@gmail.com>
Tested-by: Jason Lowe-Power <power.jg@gmail.com>
diff --git a/src/gpu/DNNMark/README.md b/src/gpu/DNNMark/README.md
index 6fe17f0..496aba9 100644
--- a/src/gpu/DNNMark/README.md
+++ b/src/gpu/DNNMark/README.md
@@ -1,12 +1,14 @@
 ---
-title: DNN Mark
+title: GCN3 DNNMark Tests
 tags:
-    - gpu
     - x86
+    - amdgpu
 layout: default
 permalink: resources/dnn-mark
 author: ["Kyle Roarty"]
 license: MIT License
+shortdoc: >
+    Resources to build a disk image with the GCN3 DNNMark workloads.
 ---
 
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