Added link to the main readme (#44)

Nyholm · web-flow · commit 9d0b25e60d56 · 2021-04-29T11:57:44.000+02:00
diff --git a/README.md b/README.md
@@ -1,6 +1,8 @@
 # Swoole Runtime
 
-A runtime for [Swoole](https://www.swoole.co.uk/)
+A runtime for [Swoole](https://www.swoole.co.uk/).
+
+If you are new to the Symfony Runtime component, read more in the [main readme](https://github.com/php-runtime/runtime).
 
 ## Installation
 
