Update CHANGELOG for Ruby 4.0 migration

Copilot · kwerle · Copilot · commit b123bc923931 · 2026-01-08T02:14:25.000Z
Co-authored-by: kwerle &lt;23320+kwerle@users.noreply.github.com&gt;
diff --git a/CHANGELOG.txt b/CHANGELOG.txt
@@ -1,5 +1,9 @@
 # Changelog
 
+#### Unreleased
+
+* Update to Ruby 4.0 - resolves gem build issues mentioned in 0.9.0
+
 #### 0.9.1 Tue Jan  6 19:32:44 PST 2026
 
 * Method parameters
