Update changelog

Signed-off-by: mulhern <amulhern@redhat.com>

Author: mulkieran

CHANGES.txt

@@ -1,3 +1,17 @@
+devicemapper 0.34.2 (UNRELEASED)
+================================
+Recommended Rust toolchain version: 1.76.0
+Recommended development release: Fedora 39
+
+- Increase retry dependency lower bound to 2.0.0:
+  https://github.com/stratis-storage/devicemapper-rs/pull/902
+
+- Tidies and Maintenance:
+  https://github.com/stratis-storage/devicemapper-rs/pull/905
+  https://github.com/stratis-storage/devicemapper-rs/pull/903
+  https://github.com/stratis-storage/devicemapper-rs/pull/900
+
+
 devicemapper 0.34.1
 ===================
 Recommended Rust toolchain version: 1.75.0