chore(deps): update pnpm to v12

Author: khepri-bot[bot]

package.json

@@ -2,7 +2,7 @@
   "name": "github-tracker",
   "version": "0.1.0",
   "private": true,
-  "packageManager": "pnpm@11.22.0",
+  "packageManager": "pnpm@12.3.4",
   "type": "module",
   "scripts": {
     "dev": "vite dev",