fix(gui): productName em ASCII (pacote RPM não aceita acento)

Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>

apps/gui/src-tauri/tauri.conf.json

@@ -1,6 +1,6 @@
 {
   "$schema": "https://schema.tauri.app/config/2",
-  "productName": "Guará",
+  "productName": "Guara",
   "version": "0.1.0",
   "identifier": "dev.guara.app",
   "build": { "frontendDist": "../ui" },