docs: fix license and author section

Author: javier-godoy

README.md

@@ -58,7 +58,7 @@ Contributions are welcome, but there are no guarantees that they are accepted as
 
 ## License & Author
 
-Add-on is distributed under Apache License 2.0. For license terms, see LICENSE.txt.
+This add-on is distributed under Apache License 2.0. For license terms, see LICENSE.txt.
 
 AppLayout is written by Flowing Code S.A.