Switch to default dxw Renovate config

We now have two dxw Renovate configs: a default one that should be good for any
repository, and an internal one intended for dxw-internal projects. Since this
repository is intended as a template for client projects built using Nest, the
default config is more appropriate to ensure we keep it ready to go

renovate.json

@@ -1,4 +1,4 @@
 {
   "$schema": "https://docs.renovatebot.com/renovate-schema.json",
-  "extends": ["github>dxw/renovate-config:internal"]
-}
+  "extends": ["github>dxw/renovate-config"]
+}