fix(docs): fix undefined issue #309

	name: Spell Checking

	on:
	pull_request:
	branches:
	- "**"

	jobs:
	spellcheck:
	name: Check Spelling with custom Python script
	runs-on: ubuntu-latest
	strategy:
	matrix:
	python-version: [3.9]
	steps:
	# Step 1: Checkout the code
	- name: Checkout code
	uses: actions/checkout@v2

	# Step 2: Set up Python
	- name: Set up Python
	uses: actions/setup-python@v2
	with:
	python-version: ${{ matrix.python-version }}

	# Step 3: Install dependencies
	- name: Install dependencies
	run: \|
	sudo apt-get update
	sudo apt-get install -y aspell aspell-en # Install aspell and the English dictionary
	python -m pip install --upgrade pip
	pip install spacy markdown-it-py pyspellchecker
	python -m spacy download en_core_web_sm # Install spaCy language model
	if [ -f requirements.txt ]; then pip install -r requirements.txt; fi

	# Step 4: Run the custom Python spell-checking script
	- name: Run spell-check script
	run: \|
	python .github/spelling/check_spelling.py \|\| exit 1

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