CHANGELOG: Add I/O virtual memory entry

Signed-off-by: Hanna Czenczek <[email protected]>

Author: XanClic

CHANGELOG.md

@@ -1,5 +1,11 @@
 # Changelog
 
+## Upcoming version
+
+### Added
+
+- \[[#327](https://github.com/rust-vmm/vm-memory/pull/327)\] I/O virtual memory support via `IoMemory`, `IommuMemory`, and `Iommu`/`Iotlb`
+
 ## \[v0.17.0\]
 
 ### Added