Updated readme with both Magento plugins (#1859)

Co-authored-by: Alex Bouma <[email protected]>

Author: indykoning

README.md

@@ -61,7 +61,7 @@ The following integrations are available and maintained by members of the Sentry
 
 - [Drupal](https://www.drupal.org/project/raven)
 - [WordPress](https://wordpress.org/plugins/wp-sentry-integration/)
-- [Magento 2](https://github.com/mygento/module-sentry)
+- Magento 2 by [JustBetter](https://github.com/justbetter/magento2-sentry) or by [Mygento](https://github.com/mygento/module-sentry)
 - ... feel free to be famous, create a port to your favourite platform!
 
 ## 3rd party integrations using the old SDK 3.x