ci: update renovate.json to apply best practices

Signed-off-by: Kengo TODA <toda_k@henry.jp>

Author: KengoTODA

renovate.json

@@ -8,7 +8,8 @@
       "automerge": true
     }
   ],
+  "minimumReleaseAge": "3 days",
   "extends": [
-    "config:recommended"
+    "config:best-practices"
   ]
 }