rtic-sync: update CHANGELOG.md

Author: datdenkikniet

rtic-sync/CHANGELOG.md

@@ -7,8 +7,10 @@ For each category, _Added_, _Changed_, _Fixed_ add new entries at the top!
 
 ## [Unreleased]
 
+### Changed
 - Don't force `Signal` import when using `make_signal` macro
-- Update `make_signal`'s documentation to match `make_channel`'s 
+- Update `make_signal`'s documentation to match `make_channel`'s
+- Add `loom` support.
 
 ## v1.3.2 - 2025-03-16