docs: Added thanks for spanish localization

README.md

@@ -86,6 +86,7 @@ We are looking for translators to make Wiki.js available in multiple languages.
 - [x] French
 - [x] Chinese - *Thanks to [@choicky](https://github.com/choicky)*
 - [x] Russian - *Thanks to [@efimlosev](https://github.com/efimlosev)*
+- [x] Spanish - *Thanks to [@MatiasArriola](https://github.com/MatiasArriola)*
 
 ## Special Thanks