fix the changes file

changes/bug23159

   o Minor bugfixes (hidden service v3):
-    - Don't non fatal assert if we can't the introduction point extend
-      information when launching circuits. In rare cases, this could happened
-      but tor would recover gracefully. This is to avoid a non fatal assert in
-      the logs. Fixes ticket 23159.; bugfix on 0.3.2.1-alpha.
+    - Don't log an assertion failure when we can't find the right information
+      to extend to an introduction point. In rare cases, this could happen,
+      causing a warning, even though tor would recover gracefully.
+      Fixes bug 23159; bugfix on 0.3.2.1-alpha.