build: Update to header 1.3.268

- Update known-good
- Generate source
diff --git a/CMakeLists.txt b/CMakeLists.txt
index f6d0cf8..273c09f 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -16,7 +16,7 @@
 # ~~~
 cmake_minimum_required(VERSION 3.17.2)
 
-project(VULKAN_LOADER VERSION 1.3.267)
+project(VULKAN_LOADER VERSION 1.3.268)
 
 add_subdirectory(scripts)
 
diff --git a/loader/loader.rc b/loader/loader.rc
index 925a065..74a6659 100644
--- a/loader/loader.rc
+++ b/loader/loader.rc
@@ -22,8 +22,8 @@
 #include "winres.h"
 
 // All set through CMake
-#define VER_FILE_VERSION 1, 3, 267, 0
-#define VER_FILE_DESCRIPTION_STR "1.3.267.Dev Build"
+#define VER_FILE_VERSION 1, 3, 268, 0
+#define VER_FILE_DESCRIPTION_STR "1.3.268.Dev Build"
 #define VER_FILE_VERSION_STR "Vulkan Loader - Dev Build"
 #define VER_COPYRIGHT_STR "Copyright (C) 2015-2023"
 
diff --git a/scripts/known_good.json b/scripts/known_good.json
index 55d737b..c033766 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": "v1.3.267"
+            "commit": "v1.3.268"
         },
         {
             "name": "googletest",