build: Update known-good for 1.1.123 header

Change-Id: Iff55cf1499d7640a22e58cdf9553e74be8d52e00
diff --git a/scripts/known_good.json b/scripts/known_good.json
index 28e94ea..75f6f33 100644
--- a/scripts/known_good.json
+++ b/scripts/known_good.json
@@ -6,7 +6,7 @@
       "sub_dir" : "Vulkan-Headers",
       "build_dir" : "Vulkan-Headers/build",
       "install_dir" : "Vulkan-Headers/build/install",
-      "commit" : "v1.1.121"
+      "commit" : "v1.1.123"
     }
   ],
   "install_names" : {