add a block about RST vs MD vs MyST; closes #217 #250

	name: Spelling Erros Check

	on: [push]

	jobs:
	build:
	strategy:
	max-parallel: 2
	matrix:
	os: [ubuntu-latest]

	runs-on: ${{ matrix.os }}

	steps:
	- uses: actions/checkout@v1
	- name: Install dependencies
	run: curl -L https://git.io/misspell \| bash

	# This will return an exit code of 2, thus triggering a failed build
	- name: Test spelling errors
	shell: bash
	run: \|
	bin/misspell -error *

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