build: Update to header 1.3.208

- Update known-good
- Generate source
diff --git a/loader/generated/loader_generated_header_version.cmake b/loader/generated/loader_generated_header_version.cmake
index f4bd39d..267200a 100644
--- a/loader/generated/loader_generated_header_version.cmake
+++ b/loader/generated/loader_generated_header_version.cmake
@@ -24,5 +24,5 @@
 #
 ############################################################################
 
-set(LOADER_GENERATED_HEADER_VERSION "1.3.207")
+set(LOADER_GENERATED_HEADER_VERSION "1.3.208")
 
diff --git a/loader/generated/vk_loader_extensions.c b/loader/generated/vk_loader_extensions.c
index d201da1..176108c 100644
--- a/loader/generated/vk_loader_extensions.c
+++ b/loader/generated/vk_loader_extensions.c
@@ -8487,6 +8487,7 @@
                                                   VK_KHR_GET_SURFACE_CAPABILITIES_2_EXTENSION_NAME,
                                                   VK_KHR_GET_DISPLAY_PROPERTIES_2_EXTENSION_NAME,
                                                   VK_KHR_SURFACE_PROTECTED_CAPABILITIES_EXTENSION_NAME,
+                                                  VK_KHR_PORTABILITY_ENUMERATION_EXTENSION_NAME,
                                                   VK_EXT_DEBUG_REPORT_EXTENSION_NAME,
 #ifdef VK_USE_PLATFORM_GGP
                                                   VK_GGP_STREAM_DESCRIPTOR_SURFACE_EXTENSION_NAME,
diff --git a/scripts/known_good.json b/scripts/known_good.json
index b6324bb..948b8ba 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": "v1.3.207"
+            "commit": "v1.3.208"
         },
         {
             "name": "googletest",