remove homepage/demo links for magento

- homepage now redirects to https://business.adobe.com/products/magento/magento-commerce.html which is the non-free edition
- demo link points to a contact form, not an interactive demo
- ref. https://github.com/awesome-selfhosted/awesome-selfhosted/issues/2266

README.md

@@ -801,7 +801,7 @@ _Related: [Community-Supported Agriculture (CSA)](#community-supported-agricultu
 - [Bagisto](https://bagisto.com/en/) - Leading Laravel open source e-commerce framework with multi-inventory sources, taxation, localization, dropshipping and more exciting features. ([Demo](https://demo.bagisto.com/), [Source Code](https://github.com/bagisto/bagisto)) `MIT` `PHP`
 - [CoreShop](https://www.coreshop.org) - CoreShop is a e-commerce plugin for Pimcore. ([Source Code](https://github.com/coreshop/CoreShop)) `GPL-3.0` `PHP`
 - [Drupal Commerce](https://drupalcommerce.org) - Drupal Commerce is a popular e-commerce module for Drupal CMS, with support for dozens of payment, shipping, and shopping related modules. ([Source Code](https://github.com/drupalcommerce/commerce)) `GPL-2.0` `PHP`
-- [Magento](https://magento.com/) - Leading provider of open omnichannel innovation. ([Demo](https://magento.com/schedule-a-demo), [Source Code](https://github.com/magento/magento2)) `OSL-3.0` `PHP`
+- [Magento Open Source](https://github.com/magento/magento2) - Leading provider of open omnichannel innovation. `OSL-3.0` `PHP`
 - [MedusaJs](https://medusajs.com/) - Medusa is an open-source headless commerce engine that enables developers to create amazing digital commerce experiences. ([Demo](https://demo.medusajs.com/a/orders?offset=0&limit=15), [Source Code](https://github.com/medusajs/medusa)) `MIT` `Nodejs`
 - [Microweber](https://microweber.com/) - Drag and Drop CMS and online shop. ([Demo](https://demo.microweber.org/), [Source Code](https://github.com/microweber/microweber)) `Apache-2.0` `PHP`
 - [Open Source POS](https://www.opensourcepos.org/) - Open Source Point of Sale is a web based point of sale system. ([Source Code](https://github.com/opensourcepos/opensourcepos)) `MIT` `PHP`