Correct changelog entry: the Upgrader was not ported yet.

debian/changelog

@@ -76,8 +76,8 @@ tails (3.9~rc1) unstable; urgency=medium
       Adjust WhisperBack accordingly (Closes: #8514). This paves the way
       towards more usable bug reports (#8722).
     - Port lots of our Perl code to more lightweight libraries.
-      This decreases the amount of memory used by Tails Upgrader and by the
-      persistence configuration interface.
+      This decreases the amount of memory used by the persistence
+      configuration interface.
     - Do not hide applications that require an admin password (Closes: #11013).
     - Try unlocking every persistent volume when multiple ones are
       available (Closes: #15653).