resources: fix link to Pannotia Color

There was a copy-paste error that caused Pannotia's BC and Color
applications to have the same permalink.  This commit fixes Color's
permalink to resolve this.

Change-Id: I953743a4f53613d17da80738674bd1ff10323508
Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5-resources/+/65831
Reviewed-by: Jason Lowe-Power <power.jg@gmail.com>
Tested-by: Jason Lowe-Power <power.jg@gmail.com>
Maintainer: Jason Lowe-Power <power.jg@gmail.com>
diff --git a/src/gpu/pannotia/color/README.md b/src/gpu/pannotia/color/README.md
index bc425bf..2917986 100644
--- a/src/gpu/pannotia/color/README.md
+++ b/src/gpu/pannotia/color/README.md
@@ -4,7 +4,7 @@
     - x86
     - amdgpu
 layout: default
-permalink: resources/pannotia/bc
+permalink: resources/pannotia/color
 shortdoc: >
     Resources to build a disk image with the GCN3 Pannotia Color workload.
 ---