Update URL for Satis (#17)

Updates the Satis url from `newfold.github.io` to the correct `newfold-labs.github.io`.

README.md

@@ -26,7 +26,7 @@ The PHP module can be installed only on the Brand plugin.
 ### 1. Add the Newfold Satis to your `composer.json`.
 
 ```bash
-composer config repositories.newfold composer https://newfold.github.io/satis
+composer config repositories.newfold composer https://newfold-labs.github.io/satis
 ```
 
 ### 2. Require the `newfold-labs/wp-module-runtime` package.