apt: fix mark when no packages (#37835)

lib/ansible/modules/packaging/os/apt.py

@@ -471,6 +471,9 @@ def parse_diff(output):
 
 
 def mark_installed_manually(m, packages):
+    if not packages:
+        return
+
     apt_mark_cmd_path = m.get_bin_path("apt-mark", required=True)
     cmd = "%s manual %s" % (apt_mark_cmd_path, ' '.join(packages))
     rc, out, err = m.run_command(cmd)