Pin AMD to 6.4.4 (#883)

Author: oulgen

.github/workflows/benchmark_dispatch.yml

@@ -90,8 +90,8 @@ jobs:
     with:
       runner: linux.rocm.gpu.gfx942.2
       python-version: "3.12"
-      image: rocm/dev-ubuntu-24.04:7.0-complete
-      runtime-version: rocm7.0
+      image: rocm/dev-ubuntu-24.04:6.4.4-complete
+      runtime-version: rocm6.4
       container-options: --device=/dev/kfd --device=/dev/dri
       alias: mi325x
       num-shards: ${{ matrix.num_shards }}