do not run upgrade after removing pins

I just upgraded a workstation to bookworm by mistake like this. Oops.

howto/upgrades/bullseye.md

@@ -82,6 +82,7 @@ See the "conflicts resolution" section below for how to handle
 
  4. Perform any pending upgrade and clear out old pins:
 
+        apt update && apt -y upgrade &&
         : Check for pinned, on hold, packages, and possibly disable &&
         rm -f /etc/apt/preferences /etc/apt/preferences.d/* &&
         rm -f /etc/apt/sources.list.d/backports.debian.org.list &&
@@ -93,7 +94,6 @@ See the "conflicts resolution" section below for how to handle
         rm -f /etc/apt/sources.list.d/proposed-updates.list &&
         rm -f /etc/apt/sources.list.d/sid.list &&
         rm -f /etc/apt/sources.list.d/testing.list &&
-        apt update && apt -y upgrade &&
         : purge removed packages &&
         apt purge $(dpkg -l | awk '/^rc/ { print $2 }') &&
         apt autoremove -y --purge &&