[Unity][Doc] Document passes that depend on `DataflowBlock`s and encourage using `ConvertToDataflow` #26785

	# Licensed to the Apache Software Foundation (ASF) under one
	# or more contributor license agreements. See the NOTICE file
	# distributed with this work for additional information
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	# to you under the Apache License, Version 2.0 (the
	# "License"); you may not use this file except in compliance
	# with the License. You may obtain a copy of the License at
	#
	# http://www.apache.org/licenses/LICENSE-2.0
	#
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	# specific language governing permissions and limitations
	# under the License.

	# GH actions.
	# We use it to cover windows and mac builds
	# Jenkins is still the primary CI

	name: PR

	on:
	# See https://docs.github.com/en/actions/using-workflows/events-that-trigger-workflows#pull_request_target
	pull_request_target:
	types: [assigned, opened, synchronize, reopened, edited, ready_for_review]

	concurrency:
	group: PR-${{ github.event.pull_request.number }}
	cancel-in-progress: true

	jobs:
	cc-reviewers:
	if: github.repository == 'apache/tvm'
	runs-on: ubuntu-latest
	steps:
	- uses: actions/checkout@v2
	with:
	submodules: "recursive"
	- name: Add cc'ed reviewers
	env:
	PR: ${{ toJson(github.event.pull_request) }}
	GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
	run: \|
	set -eux
	python ci/scripts/github/github_cc_reviewers.py \|\| echo step failed

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