Add references #78

	---
	# This workflow asserts that the SOP index table at 'sops/README.md' is up to date.
	# The logic of this workflow is:
	# - Details: ZH-301
	# - Why: helps identify mistakes in the updating of the SOP index table
	# - Would block the PR if failed? Yes. Errors (i.e. differences between the
	# existing and new index tables) should be addressed.
	# - How: Executes the script 'compare_index.py'
	name: \|
	[REQUIRED] Compare SOP Index table

	on:
	pull_request:
	branches:
	- main
	- dev

	jobs:
	compare-sop-index:
	runs-on: ubuntu-latest

	steps:
	- name: Checkout repository
	uses: actions/checkout@v3

	- name: Set up Python
	uses: actions/setup-python@v4
	with:
	python-version: 3.x

	- name: Install dependencies
	run: \|
	pip install --upgrade pip
	requirements_f="./requirements.txt"
	if [ -f "$requirements_f" ]; then pip install -r "$requirements_f" --verbose; fi

	- name: Run SOP index comparison
	# The comparison exit codes will determine whether this workflow finishes or not
	run: \|
	echo "Remember that creating the index table automatically is very easy! Just make use of 'scripts/sop_index.py'. For example, running:"
	echo "'python3 scripts/sop_index.py sops/ -v 1'"
	python scripts/compare_index.py sops/README.md sops/ -v 1

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