use scratch-renovate-config:conservative

.gitattributes

@@ -20,6 +20,7 @@
 *.js text eol=lf
 *.js.map text eol=lf
 *.json text eol=lf
+*.json5 text eol=lf
 *.jsx text eol=lf
 *.md text eol=lf
 *.vert text eol=lf

renovate.json → renovate.json5

 {
   "$schema": "https://docs.renovatebot.com/renovate-schema.json",
+
   "extends": [
-    "local>LLK/renovate-config"
+    "github>LLK/scratch-renovate-config:conservative"
   ]
 }