add a comment explaining how to make the sample app not crashing with RenderDoc
diff --git a/src/VulkanSample.cpp b/src/VulkanSample.cpp
index 2f4a339..203bc09 100644
--- a/src/VulkanSample.cpp
+++ b/src/VulkanSample.cpp
@@ -1284,6 +1284,14 @@
 

     if(VK_KHR_dedicated_allocation_enabled)

     {

+        /*

+        Comment out this line to make the app working with RenderDoc.

+

+        RenderDoc relies on pointers to Vulkan function being null or not null instead

+        of checking whether the app really uses Vulkan 1.0 or 1.1. This app uses Vulkan

+        1.0 and VK_KHR_dedicated_allocation extension instead of equivalent

+        functionality embedded into Vulkan 1.1.

+        */

         allocatorInfo.flags |= VMA_ALLOCATOR_CREATE_KHR_DEDICATED_ALLOCATION_BIT;

     }