Fix an invalid copyright line in debian/copyright

debian/copyright

@@ -15,7 +15,7 @@ Copyright: 2021-2023 Andrea Zanellato <redtid3@gmail.com>
 License: Expat
 
 Files: resources/freedesktop/application.appdata.xml.in
-Copyright: none
+Copyright: LXQt team
 License: CC0-1.0
 Comment: The file itself does not specify its license. However, it specifies
  that the metadata license is to be expanded from the variable

debian/rules

@@ -7,5 +7,5 @@ override_dh_auto_configure:
 	dh_auto_configure -- -DCMAKE_BUILD_TYPE=Release
 
 override_dh_installman:
-	help2man -N "./debian/picom-conf/usr/bin/picom-conf -platform offscreen" > debian/picom-conf.1
+	help2man -N -n "configure the Picom compositor" "./debian/picom-conf/usr/bin/picom-conf -platform offscreen" > debian/picom-conf.1
 	dh_installman