Add 'single-hart' changelog entry

ivq · ivq · commit 17185e9627d6 · 2023-11-10T19:21:10.000+08:00
Signed-off-by: Chien Wong &lt;m@xv97.com&gt;
diff --git a/riscv-rt/CHANGELOG.md b/riscv-rt/CHANGELOG.md
@@ -12,6 +12,7 @@ and this project adheres to [Semantic Versioning](http://semver.org/).
 - New GitHub workflow for checking invalid labels in PRs
 - New GitHub workflow for checking modifications on CHANGELOG.md
 - New GitHub workflow for checking clippy lints in PRs
+- Optional cargo feature `single-hart` for single CPU targets
 
 ### Changed
 
