chore: do not ignore examples & some fixture folders for renovate

Renovate's `config:recommended` ignores `**/examples/**` by default.
But we want to keep the examples up-to-date, so we need to unignore it.

The same goes for `test/fixtures/file-based-routing`.

I didn't unignore the whole `test/fixtures` folder because the other
fixture, `with-older-espree`, intentionally installs older versions of
dependencies for testing purposes.

Author: haoqunjiang

renovate.json

@@ -2,5 +2,9 @@
   "$schema": "https://docs.renovatebot.com/renovate-schema.json",
   "extends": [
     "github>haoqunjiang/renovate-presets:npm.json5"
+  ],
+  "ignorePaths": [
+    "!examples/**",
+    "!test/fixtures/file-based-routing"
   ]
 }