update demo link for google-webfonts-helper

- ref. https://github.com/awesome-selfhosted/awesome-selfhosted/issues/2266

README.md

@@ -1294,7 +1294,7 @@ Software that does not fit in another section.
 - [DOMJudge](https://www.domjudge.org/) - A system for running a programming contest, like the ICPC regional and world championship programming contests. ([Demo](https://www.domjudge.org/demo), [Source Code](https://github.com/DOMjudge/domjudge)) `GPL-2.0/BSD-3-Clause/MIT` `PHP`
 - [F-Droid](https://f-droid.org) - Server tools for maintaining an F-Droid repository system. ([Source Code](https://gitlab.com/fdroid/fdroidserver)) `AGPL-3.0` `Python/Docker` 
 - [Flox](https://github.com/devfake/flox) `⚠` - Self hosted movie, TV series and anime watch list with a 3-point rating system. Uses The Movie Database backend for information. ([Demo](https://flox-demo.pyxl.dev/)) `MIT` `PHP`
-- [google-webfonts-helper](https://github.com/majodev/google-webfonts-helper) `⚠` - Hassle-Free Way to Self-Host Google Fonts. Get eot, ttf, svg, woff and woff2 files + CSS snippets. ([Demo](https://google-webfonts-helper.herokuapp.com/)) `MIT` `Nodejs`
+- [google-webfonts-helper](https://github.com/majodev/google-webfonts-helper) `⚠` - Hassle-Free Way to Self-Host Google Fonts. Get eot, ttf, svg, woff and woff2 files + CSS snippets. ([Demo](https://gwfh.mranftl.com/fonts)) `MIT` `Nodejs`
 - [graph-vl](https://github.com/verifid/graph-vl) - Identity document verification using Machine Learning and GraphQL. `MIT` `Python`
 - [IconCaptcha](https://www.fabianwennink.nl/projects/IconCaptcha/) - IconCaptcha is a self-hosted, fast, simple and user-friendly captcha for PHP. ([Source Code](https://github.com/fabianwennink/IconCaptcha-Plugin-jQuery-PHP)) `MIT` `PHP`
 - [Journal](https://github.com/inoda/journal) - Simple journaling with encrypted entries and sharing capabilities. `MIT` `Ruby`