Fix return type of GetAllocationNextPtr Returning `void* const` doesn't mean anything (produces a warning with -Wignored-qualifiers). Based on usage, it looks like the returned pointer is expected to point at const data, so I've fixed the declaration to reflect that.

diff --git a/include/vk_mem_alloc.h b/include/vk_mem_alloc.h
index 7b577c3..90410b5 100644
--- a/include/vk_mem_alloc.h
+++ b/include/vk_mem_alloc.h

@@ -10928,7 +10928,7 @@
     uint32_t GetAlgorithm() const { return m_Algorithm; }

     bool HasExplicitBlockSize() const { return m_ExplicitBlockSize; }

     float GetPriority() const { return m_Priority; }

-    void* const GetAllocationNextPtr() const { return m_pMemoryAllocateNext; }

+    const void* GetAllocationNextPtr() const { return m_pMemoryAllocateNext; }

     // To be used only while the m_Mutex is locked. Used during defragmentation.

     size_t GetBlockCount() const { return m_Blocks.size(); }

     // To be used only while the m_Mutex is locked. Used during defragmentation.