[ci] do not block pull requests on cache_bitstreams #17832

	# Copyright lowRISC contributors (OpenTitan project).
	# Licensed under the Apache License, Version 2.0, see LICENSE for details.
	# SPDX-License-Identifier: Apache-2.0
	name: 'Check for and block unauthorized changes'

	on:
	pull_request_target:

	permissions:
	contents: read
	# Needed to read comments for authorizations
	pull-requests: read

	jobs:
	check-changes:
	runs-on: "ubuntu-latest"
	steps:
	- name: Checkout
	uses: actions/checkout@v4

	- name: Determine changed files
	run: \|
	pr_url="https://github.com/${{ github.repository }}/pull/${{ github.event.number }}"
	echo $pr_url
	gh pr diff $pr_url --name-only > $HOME/changed_files
	env:
	GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}

	- name: Show files changed
	run: cat $HOME/changed_files

	- name: Check for blocked changes
	run: \|
	./ci/scripts/check-pr-changes-allowed.py $HOME/changed_files \
	--gh-repo ${{ github.repository }} \
	--gh-token ${{ secrets.GITHUB_TOKEN }} \
	--pr-number ${{ github.event.number }}

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