NEWS: Refer to apt(8) instead of apt(1)

Reported-By: Mattia Rizzolo (on IRC)
Gbp-Dch: ignore

debian/NEWS

@@ -1,7 +1,7 @@
 apt (1.2~exp1) experimental; urgency=medium
 
   [ Automatic removal of debs after install ]
-  After packages are successfully installed by apt(1),
+  After packages are successfully installed by apt(8),
   the corresponding .deb package files will be
   removed from the /var/cache/apt/archives cache directory.