Merge pull request 'Configure Renovate' (#3) from renovate/configure into main

Reviewed-on: #3

renovate.json

@@ -0,0 +1,6 @@
+{
+  "$schema": "https://docs.renovatebot.com/renovate-schema.json",
+  "extends": [
+    "local>sora/renovate-config"
+  ]
+}