[bug] window.is_devtools_open() always return false

[hanaTsuk1]

Describe the bug

#[tauri::command]
fn is_devtools_open(window: Window) -> bool {
    window.is_devtools_open()
}

Reproduction

No response

Expected behavior

No response

Full tauri info output

[✔] Environment
    - OS: Windows 10.0.22631 X64
    ✔ WebView2: 120.0.2210.144
    ✔ MSVC: Visual Studio ���ɹ��� 2022
    ✔ rustc: 1.72.0 (5680fa18f 2023-08-23)
    ✔ cargo: 1.72.0 (103a7ff2e 2023-08-15)
    ✔ rustup: 1.26.0 (5af9b9484 2023-04-05)
    ✔ Rust toolchain: stable-x86_64-pc-windows-msvc (default)    - node: 18.18.0
    - pnpm: 8.7.6
    - yarn: 1.22.19
    - npm: 9.8.1

[-] Packages
    - tauri [RUST]: 2.0.0-alpha.21
    - tauri-build [RUST]: 2.0.0-alpha.14
    - wry [RUST]: 0.35.2
    - tao [RUST]: 0.24.0
    - tauri-cli [RUST]: 2.0.0-alpha.20
    - @tauri-apps/api [NPM]: 2.0.0-alpha.13
    - @tauri-apps/cli [NPM]: 2.0.0-alpha.21

[-] App
    - build-type: bundle
    - CSP: default-src 'self'; img-src 'self' asset: http://asset.localhost data: blob:; style-src 'self' 'unsafe-inline'; connect-src ipc: http://ipc.localhost
    - distDir: ../dist
    - devPath: http://localhost:1420/
    - framework: Vue.js
    - bundler: Rollup

Stack trace

No response

Additional context

No response