[Fix] Dependencies find_package pybind11 error

[mingyueliuh]

Description

To fix the CMake configuration error when a dependency brought in via FetchContent uses find_package(pybind11 REQUIRED)
Similar with #23939

Major Changes：

• rename project name from pybind11_project to pybind11

Motivation and Context

Get the following build error when Dependencies use find_package(pybind11 REQUIRED)

Could not find a package configuration file provided by "pybind11" with any
  of the following names:

    pybind11Config.cmake
    pybind11-config.cmake

pybind11 project name is "pybind11" (https://github.com/pybind/pybind11/blob/master/CMakeLists.txt#L38-L41)
Config cmake file name is "pybind11Config.cmake" (https://github.com/pybind/pybind11/blob/master/CMakeLists.txt#L323-L325)