Added changelog entry

ElectreAAS · Leonidas-from-XIV · commit d1f6af9c5867 · 2025-09-08T15:02:42.000+02:00
Signed-off-by: Ambre Austen Suhamy &lt;ambre@tarides.com&gt;
diff --git a/doc/changes/12064.md b/doc/changes/12064.md
@@ -0,0 +1,5 @@
+## Added
+
+- Allow `dune fmt` to properly run while a watch mode server is running.
+  Note that the `--preview` flag is not supported in this mode.
+  (#12064, @ElectreAAS)
