tools: Suggest lastlog2 in Debian package

Debian testing dropped lastlog and introduced a separate lastlog2
package. This provides "last logged in" functionality on the Accounts
page.

tools/debian/control

@@ -140,6 +140,7 @@ Depends: ${misc:Depends},
          openssl,
 # policykit-1 was split into multiple packages; keep old name for Debian 11 and Ubuntu
 Recommends: sudo | pkexec | policykit-1
+Suggests: lastlog2
 Provides: cockpit-shell,
           cockpit-systemd,
           cockpit-tuned,