Use app auth instead of token auth #139

	## @file
	# Assign reviewers from a REVIEWERS file using CODEOWNERS syntax
	#
	# Copyright (c) 2022, Intel Corporation. All rights reserved.<BR>
	# SPDX-License-Identifier: BSD-2-Clause-Patent
	##

	name: Assign reviewers from a REVIEWERS file using CODEOWNERS syntax

	on:
	pull_request_target:
	types: [opened, synchronize, reopened, ready_for_review]
	branches:
	- 'master'

	jobs:
	assign_reviewers:
	if: github.event.pull_request.draft == false
	runs-on: ubuntu-latest
	steps:
	- name: Checkout Pull Request Target
	uses: actions/checkout@v4
	- name: Get Token
	id: get_workflow_token
	uses: peter-murray/workflow-application-token-action@v2
	with:
	application_id: ${{ secrets.APPLICATION_ID }}
	application_private_key: ${{ secrets.APPLICATION_PRIVATE_KEY }}
	organization: tianocore
	- uses: mdkinney/github-action-assign-reviewers@main
	with:
	token: ${{ steps.get_workflow_token.outputs.token }}

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