khronos: Fixed a typo in a Vulkan header, to match upstream.

Fixes #7916.

src/video/khronos/vulkan/vk_icd.h

@@ -70,7 +70,7 @@ extern "C" {
 #endif
     VKAPI_ATTR VkResult VKAPI_CALL vk_icdNegotiateLoaderICDInterfaceVersion(uint32_t* pVersion);
     VKAPI_ATTR PFN_vkVoidFunction VKAPI_CALL vk_icdGetInstanceProcAddr(VkInstance instance, const char* pName);
-    VKAPI_ATTR PFN_vkVoidFunction VKAPI_CALL vk_icdGetPhysicalDeviceProcAddr(VkInstance isntance, const char* pName);
+    VKAPI_ATTR PFN_vkVoidFunction VKAPI_CALL vk_icdGetPhysicalDeviceProcAddr(VkInstance instance, const char* pName);
 #if defined(VK_USE_PLATFORM_WIN32_KHR)
     VKAPI_ATTR VkResult VKAPI_CALL vk_icdEnumerateAdapterPhysicalDevices(VkInstance instance, LUID adapterLUID,
         uint32_t* pPhysicalDeviceCount, VkPhysicalDevice* pPhysicalDevices);