Update the font README to link to marlinfw.org

buildroot/share/fonts/README.md

 # Marlin fonts
 
+
 ## Author and license
 The original author of the following font files is [A. Hardtung](https://github.com/AnHardt).
 
  - ISO10646_Kana.fon ([fe2bd23](https://github.com/MarlinFirmware/Marlin/commit/fe2bd237d556439499dfdee852c1550c7a16430a))
  - Marlin_symbols.fon ([fe2bd23](https://github.com/MarlinFirmware/Marlin/commit/fe2bd237d556439499dfdee852c1550c7a16430a))
 
-Any additional changes to these font files being distributed with Marlin are copyrighted under the terms of the [GPLv3](http://www.gnu.org/licenses/gpl-3.0.txt) license.
+Additional changes to the original font files being distritubted with Marlin are copyrighted under the terms of the [GPLv3](http://www.gnu.org/licenses/gpl-3.0.txt) license.
+
 
 ## Documentation
+For detailed information about [adding new fonts](http://www.marlinfw.org/docs/development/fonts.html) to Marlin visit our documentation website.