[gha] Remove matrix config for doc #2

	on:
	push:
	branches:
	- main
	jobs:
	doc:
	runs-on: ubuntu-latest
	steps:
	- name: checkout
	uses: actions/checkout@master
	- name: install racket
	uses: Bogdanp/[email protected]
	with:
	architecture: 'x64'
	distribution: 'full'
	version: 'stable'
	- name: install packages
	run: raco pkg install --batch --auto ./raco-run{,-cmd}
	- name: build documentation
	run: \|
	scribble +m --redirect-main http://pkg-build.racket-lang.org/doc/ \
	--dest ./doc --dest-name index ./raco-run/scribblings/raco-run.scrbl
	- name: deploy documentation
	run: \|
	cd doc
	git init -b gh-pages
	git config user.name 'GHA'
	git config user.email [email protected]
	git add .
	git commit -m 'Deploy to GitHub Pages'
	git push --force 'https://samdphillips:${{ github.token }}@github.com/${{ github.repository }}' gh-pages

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