chore: ignore root package.json/bun.lock in Renovate

These are managed by upstream — our fork syncs deps via the
upstream-sync workflow. Keep Renovate active for .forgejo/kcl-ci/
dependencies (kcl.mod git tags).

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

renovate.json

@@ -1,5 +1,11 @@
 {
   "$schema": "https://docs.renovatebot.com/renovate-schema.json",
   "extends": ["local>renovate/renovate-config"],
-  "ignorePaths": [".github/**", "base-action/**", "node_modules/**"]
+  "ignorePaths": [
+    ".github/**",
+    "base-action/**",
+    "node_modules/**",
+    "package.json",
+    "bun.lock"
+  ]
 }