Add chapter 13 content in English, Spanish, and Italian, along with r… #18

	name: Genera PDF

	on:
	push:
	branches:
	- main
	paths:
	- 'book/**'

	jobs:
	build:

	runs-on: ubuntu-latest

	steps:
	- uses: actions/checkout@v4

	- name: generate pdf
	run: \|
	cd book
	pip install reportlab markdown Pillow
	python ebook.py

	- name: commit & push
	run: \|
	git add -A
	git config user.name github-actions
	git config user.email github-actions@github.com
	git add .
	git commit -m "update ebook"
	git push

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