tauri: change mainBinaryName to just OpenCode

packages/tauri/src-tauri/tauri.conf.json

@@ -1,7 +1,7 @@
 {
   "$schema": "https://schema.tauri.app/config/2",
   "productName": "OpenCode",
-  "mainBinaryName": "OpenCode Desktop",
+  "mainBinaryName": "OpenCode",
   "version": "../package.json",
   "identifier": "ai.opencode.desktop",
   "build": {