Add zizmor checks for github actions #25

	name: Zenodo validator
	on: [push, pull_request]

	jobs:
	zenodo:
	runs-on: ubuntu-22.04

	steps:
	- uses: actions/checkout@v4
	with:
	persist-credentials: false
	- name: Set up Python
	uses: actions/setup-python@v5
	with:
	python-version:
	cache: 'pip'

	- name: Install dependencies
	run: \|
	python -m pip install check-jsonschema

	# From https://github.com/zenodraft/metadata-schema-zenodo/blob/main/schema.json
	- name: Test
	run:
	check-jsonschema --schemafile .github/workflows/zenodo.schema .zenodo.json

Provide feedback