chore: remove connectivity probe (example.com) — internet access now via CORS proxy; drop example.com from proxy allowlist; bump 0.1.20

package.json

@@ -1,6 +1,6 @@
 {
   "name": "figma-ai-plugin",
-  "version": "0.1.19",
+  "version": "0.1.20",
   "private": true,
   "dependencies": {
     "@create-figma-plugin/ui": "^4.0.3",