ci: set package manager to pnpm@10.2.0

Author: peterbud

package.json

@@ -56,5 +56,6 @@
     "typescript": "~5.6.3",
     "vitest": "^3.0.5",
     "vue-tsc": "^2.2.0"
-  }
+  },
+  "packageManager": "pnpm@10.2.0"
 }