I have a logout form, this goes to the route in web.php, in the controller I have a logout method there is a code to move to the home page, but the error 404 not found appears

 public function logout()
    {
        Auth::logout();
        request()->session()->invalidate();

        request()->session()->regenerateToken();

        return redirect('/');
    }

Route::get('/', [PostController::class, 'home']);

<form action="post" action="/logout">
                @csrf
                <button class="dropdown-item" type="submit"><i class="bi bi-box-arrow-right"></i> Logout</button>
              </form>

I tried

php artisan cache:clear

but it still has an error, I hope someone can help me