Updates to `matrix` #60

	name: Build GraphBLAS C++ Specification
	on: [push]
	permissions:
	contents: write
	jobs:
	Build-GraphBLAS-Spec:
	runs-on: ubuntu-latest
	container:
	image: benbrock/graphblas-cpp:build-docs-0.3
	if: ${{ github.ref != 'refs/heads/gh-pages' }}
	steps:
	- name: Check out repository code
	uses: actions/checkout@v3
	- name: Build spec
	run: \|
	cd $GITHUB_WORKSPACE/markdown
	make
	mkdir graphblas-cpp-spec
	cp graphblas.pdf graphblas-cpp-spec
	cp graphblas.html graphblas-cpp-spec
	- name: Check on spec
	run: ls $GITHUB_WORKSPACE/markdown
	- name: Archive GraphBLAS C++ Spec
	uses: actions/upload-artifact@v2
	with:
	name: graphblas-cpp-spec
	path: \|
	${{ github.workspace }}/markdown/graphblas-cpp-spec

	Deploy-GitHub-Pages:
	runs-on: ubuntu-latest
	needs: Build-GraphBLAS-Spec
	if: ${{ github.ref == 'refs/heads/master' }}
	steps:
	- name: Checkout gh-pages
	uses: actions/checkout@v3
	with:
	ref: gh-pages
	path: gh-pages
	- name: Download artifact
	uses: actions/download-artifact@v2
	with:
	name: graphblas-cpp-spec
	- name: Publish to GitHub Pages
	run: \|
	cd $GITHUB_WORKSPACE
	cp graphblas.html gh-pages/docs/index.html
	cd gh-pages
	find *
	git config user.name github-actions
	git config user.email [email protected]
	git add .
	# Ignore errors because no updates returns an error status.
	git commit --reset-author --amend -m "Update from github actions"
	git push --force origin gh-pages

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