XXX: Roll rocm-preview back to prove if SD works

Author: superm1

src/cpp/resources/backend_versions.json

@@ -18,7 +18,7 @@
   "sd-cpp": {
     "cpu": "master-574-0134eac",
     "rocm-stable": "master-574-0134eac",
-    "rocm-preview": "master-574-0134eac"
+    "rocm-preview": "master-569-ab6afe8"
   },
   "therock": {
     "version": "7.12.0",