build: Update to header 1.3.280

- Update known-good
- Generate source
diff --git a/include/vulkan/utility/vk_struct_helper.hpp b/include/vulkan/utility/vk_struct_helper.hpp
index bf834cf..55dda0e 100644
--- a/include/vulkan/utility/vk_struct_helper.hpp
+++ b/include/vulkan/utility/vk_struct_helper.hpp
@@ -940,6 +940,7 @@
 template <> inline VkStructureType GetSType<VkPhysicalDeviceDescriptorPoolOverallocationFeaturesNV>() { return VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_DESCRIPTOR_POOL_OVERALLOCATION_FEATURES_NV; }
 template <> inline VkStructureType GetSType<VkPhysicalDeviceRawAccessChainsFeaturesNV>() { return VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_RAW_ACCESS_CHAINS_FEATURES_NV; }
 template <> inline VkStructureType GetSType<VkPhysicalDeviceShaderAtomicFloat16VectorFeaturesNV>() { return VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_SHADER_ATOMIC_FLOAT16_VECTOR_FEATURES_NV; }
+template <> inline VkStructureType GetSType<VkPhysicalDeviceRayTracingValidationFeaturesNV>() { return VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_RAY_TRACING_VALIDATION_FEATURES_NV; }
 template <> inline VkStructureType GetSType<VkAccelerationStructureGeometryTrianglesDataKHR>() { return VK_STRUCTURE_TYPE_ACCELERATION_STRUCTURE_GEOMETRY_TRIANGLES_DATA_KHR; }
 template <> inline VkStructureType GetSType<VkAccelerationStructureGeometryAabbsDataKHR>() { return VK_STRUCTURE_TYPE_ACCELERATION_STRUCTURE_GEOMETRY_AABBS_DATA_KHR; }
 template <> inline VkStructureType GetSType<VkAccelerationStructureGeometryInstancesDataKHR>() { return VK_STRUCTURE_TYPE_ACCELERATION_STRUCTURE_GEOMETRY_INSTANCES_DATA_KHR; }
diff --git a/include/vulkan/vk_enum_string_helper.h b/include/vulkan/vk_enum_string_helper.h
index 445e007..6f4fe4c 100644
--- a/include/vulkan/vk_enum_string_helper.h
+++ b/include/vulkan/vk_enum_string_helper.h
@@ -1908,6 +1908,8 @@
             return "VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_RAW_ACCESS_CHAINS_FEATURES_NV";
         case VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_SHADER_ATOMIC_FLOAT16_VECTOR_FEATURES_NV:
             return "VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_SHADER_ATOMIC_FLOAT16_VECTOR_FEATURES_NV";
+        case VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_RAY_TRACING_VALIDATION_FEATURES_NV:
+            return "VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_RAY_TRACING_VALIDATION_FEATURES_NV";
         default:
             return "Unhandled VkStructureType";
     }
diff --git a/scripts/known_good.json b/scripts/known_good.json
index 83028ab..e99b26c 100644
--- a/scripts/known_good.json
+++ b/scripts/known_good.json
@@ -7,7 +7,7 @@
             "sub_dir": "Vulkan-Headers",
             "build_dir": "Vulkan-Headers/build",
             "install_dir": "Vulkan-Headers/build/install",
-            "commit": "v1.3.279"
+            "commit": "v1.3.280"
         },
         {
             "name": "googletest",