Use rdflib instead of jena #7

	name: Validate Turtle file
	on: [push]
	jobs:
	validate:
	runs-on: ubuntu-latest
	steps:
	- name: Checkout
	uses: actions/checkout@v3
	- name: Set up Python
	uses: actions/setup-python@v4
	with:
	python-version: '3.x'
	- name: Install Python dependencies
	run: \|
	python -m pip install --upgrade pip
	pip install -r tests/requirements.txt
	- name: Validate Turtle file
	run: \|
	python tests/validate_ontology.py

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