Update changelog

Signed-off-by: mulhern <[email protected]>

Author: mulkieran

CHANGES.txt

@@ -1,3 +1,15 @@
+devicemapper 0.34.1 (unreleased)
+================================
+Recommended Rust toolchain version: 1.73.0
+Recommended development release: Fedora 38
+
+- Downgrade some log entries to trace level:
+  https://github.com/stratis-storage/devicemapper-rs/pull/890
+
+- Tidies and Maintenance:
+  https://github.com/stratis-storage/devicemapper-rs/pull/889
+
+
 devicemapper 0.34.0
 ===================
 Recommended Rust toolchain version: 1.73.0