docs: remove nix-shell section from contributing.md #213

	name: 'markdown checks'
	on:
	push:
	branches:
	- master
	pull_request:
	paths:
	- "**.md"

	jobs:
	dead-links:
	name: Dead Link Checker
	runs-on: ubuntu-latest
	steps:
	- name: Run DeadFinder
	uses: hahwul/[email protected]
	id: broken-link
	with:
	command: file
	target: "**.md"
	trailing-ws:
	name: Find Trailing Whitespace
	runs-on: ubuntu-latest
	steps:
	- uses: actions/checkout@v4
	- uses: ocular-d/[email protected]

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