README: mention svelte web interface

Author: chl33

README.md

@@ -63,3 +63,5 @@ This project is built using my C++ framework for ESP devices.
 - [og3](https://github.com/chl33/og3) My application framework.
 - [og3x-oled](https://github.com/chl33/og3x-oled) Support for the OLED screen I use with this project
 - [og3x-shtc3](https://github.com/chl33/og3x-shtc3) Support for the SHTC3 temperature/humidty sensor used by this project.
+
+The web interface for the project uses the Svelte framework, and was partially generated by Claude (Anthropic). Claude said it was OK to include the code in this MIT-licensed project.