Add CHANGELOG entry for #269

This change adds a CHANGELOG entry for #541.

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

Author: d-e-s-o

libbpf-rs/CHANGELOG.md

@@ -2,6 +2,9 @@ Unreleased
 ----------
 - Overhauled `query::ProgramInfo` and `query::ProgInfoIter` to make them more
   readily usable
+- Reworked `ObjectBuilder`, making `name` method fallible, `opts` to return a
+  reference to `libbpf_sys::bpf_object_open_opts`, and `open_memory` to no
+  longer require the object name
 
 
 0.21.2