Update index.md

Author: eanorambuena

index.md

@@ -43,7 +43,7 @@ Learn more about how to help others contribute, check out the [CONTRIBUTING GUID
 ### Credits
 
 * **Emmanuel Norambuena** - *initial work* - [Eanorambuena](https://github.com/eanorambuena)
-* **Héctor Costa** - *Pyfoch is based on his work (2015-2021 © Héctor Costa Guzmán (Licencia CC BY 4.)* - [View his webpage](https://docs.hektorprofe.net/python/interfaces-graficas-con-tkinter/editor-de-texto/)
+* **Héctor Costa** - *Pyfoch is based on his work <2015-2021 © Héctor Costa Guzmán (CC BY 4 License)>* - [View his webpage](https://docs.hektorprofe.net/python/interfaces-graficas-con-tkinter/editor-de-texto/)
 * **Andrés Villanueva** - *this web page is based on the README made by him* - [Villanuevand](https://github.com/Villanuevand)
 * **Just the Docs** - *this site uses their documentation theme for Jekyll* - [View in Github](https://github.com/pmarsceill/just-the-docs)