Remove the LICENSE file install from upstream as debian already installs it.
--- a/meson.build
+++ b/meson.build
@@ -487,8 +487,8 @@
 ]
 
 install_man(man_files)
-install_data(['AUTHORS', 'LICENSE.md'],
-             rename : ['doc/siril/AUTHORS', 'doc/siril/LICENSE.md'],
+install_data(['AUTHORS'],
+             rename : ['doc/siril/AUTHORS'],
              install_dir : siril_share)
 
 
