docs: fix license and author section

Author: javier-godoy

README.md

@@ -74,7 +74,7 @@ Then, follow these steps for creating a contibution:
 
 ## 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.
 
 YearMonthCalendar Add-on is written by Flowing Code S.A.
 
@@ -106,4 +106,4 @@ To do so, just add ```com.flowingcode``` to the ```vaadin.whitelisted-packages``
 
 ```vaadin.whitelisted-packages = com.vaadin,org.vaadin,dev.hilla,com.flowingcode```
 
-More information on Spring whitelisted configuration [here](https://vaadin.com/docs/latest/integrations/spring/configuration/#configure-the-scanning-of-packages).
+More information on Spring whitelisted configuration [here](https://vaadin.com/docs/latest/integrations/spring/configuration/#configure-the-scanning-of-packages).