Add CHANGELOG entry for #617

Add a CHANGELOG entry for the changes made as part of #617.

Signed-off-by: Daniel Müller <[email protected]>

Author: d-e-s-o

libbpf-rs/CHANGELOG.md

@@ -15,6 +15,7 @@ Unreleased
   - Added `pin_root_path` setter
 - Added `AsRawLibbpf` trait as a unified way to retrieve `libbpf` equivalents
   for `libbpf-rs` objects
+- Added `Map::update_batch` method
 - Implemented `Send` for `Link`
 - Bumped minimum Rust version to `1.65`
 - Updated `bitflags` dependency to `2.0`