Fix small problem in "Depth buffering" (#289)

This code was still refering to `createCommandBuffers`  instead of `recordCommandBuffer`.

Author: rHermes

en/07_Depth_buffering.md

@@ -473,7 +473,7 @@ void initVulkan() {
 ## Clear values
 
 Because we now have multiple attachments with `VK_ATTACHMENT_LOAD_OP_CLEAR`, we
-also need to specify multiple clear values. Go to `createCommandBuffers` and
+also need to specify multiple clear values. Go to `recordCommandBuffer` and
 create an array of `VkClearValue` structs:
 
 ```c++