test: maybe fix mini delete error?

lua/auto-session/session-lens/init.lua

@@ -20,7 +20,7 @@ function SessionLens.make_telescope_callback(opts)
     -- Don't include <session>x.vim files that nvim makes for custom user
     -- commands
     if not Lib.is_session_file(session_root_dir .. file_name) then
-      return nil
+      return {}
     end
 
     -- the name of the session, to be used for restoring/deleting