fix a lintchanges problem

changes/bug23575

@@ -1,4 +1,4 @@
   o Minor bugfixes (scheduler):
     - Avoid a compilation warning on macOS in scheduler_ev_add() caused by
       a different tv_usec data type.
-      Fixes 23575 on 0.3.2.1-alpha.
+      Fixes bug 23575; bugfix on 0.3.2.1-alpha.