Use certain fields from library context instead of app context that are deprecated in the app context and are removed from antsibull-core 3.0.0 #957

	---
	# Copyright (c) Ansible Project
	# GNU General Public License v3.0+ (see LICENSES/GPL-3.0-or-later.txt or https://www.gnu.org/licenses/gpl-3.0.txt)
	# SPDX-License-Identifier: GPL-3.0-or-later

	# This workflow will install CSS build dependencies and run the CSS build

	name: Build CSS

	on:
	push:
	branches:
	- main
	- stable-*
	pull_request:
	branches:
	- main
	- stable-*
	# Run once per week (Monday at 04:00 UTC)
	schedule:
	- cron: '0 4 * * 1'

	jobs:
	build:
	runs-on: ubuntu-latest

	steps:
	- uses: actions/checkout@v4

	- name: Use Node.js
	uses: actions/setup-node@v4
	with:
	node-version: 16.x

	- name: Install dependencies
	run: \|
	npm install -g sass autoprefixer cssnano postcss postcss-cli

	- name: Build CSS
	run: \|
	./build.sh
	working-directory: ./src/sphinx_antsibull_ext/css

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