feat: add 2023 day 09 #85

	name: Update README

	on:
	push:
	branches:
	- master
	paths:
	- 'src/adventofcode/year_/*'
	- 'src/adventofcode/scripts/generate_readme.py'

	jobs:
	build:
	runs-on: ubuntu-latest
	steps:
	- uses: actions/checkout@v3
	- name: Set up Python
	uses: actions/setup-python@v4
	with:
	python-version: "3.12"
	- name: Install package
	run: \|
	python -m pip install --upgrade pip
	pip install -e .
	- name: Generate new README
	run: generate-readme
	- name: Commit new README
	run: \|
	git config --global user.name 'Marcel Blijleven'
	git config --global user.email 'marcelblijleven@users.noreply.github.com'
	[[ -n $(git status -s) ]] && git add -A && git commit -m "docs: update README"
	git push

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