Changelog: Add notes for PR #1875

Author: iostat

CHANGELOG.md

@@ -18,6 +18,8 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
   ([#1838](https://github.com/o1-labs/mina-rust/pull/1838))
 - **Web Node**: fix webnode build, add quality-of-life improvements when running
   webnode in Docker. ([#1778](https://github.com/o1-labs/mina-rust/pull/1778))
+- **CI**: add beta channel lint workflow to catch build issues early
+  ([#1875](https://github.com/o1-labs/mina-rust/pull/1875))
 
 ### Changes