Bump golang.org/x/net from 0.17.0 to 0.23.0 in /do #215

	name: Go
	on: [push, pull_request]
	jobs:
	build:
	name: Build
	runs-on: ubuntu-latest
	steps:
	- name: Set up Go
	uses: actions/setup-go@v2
	with:
	go-version: 1.16

	- name: Check out source code
	uses: actions/checkout@v2

	- name: Test
	run: go test -v ./...

	- name: Smoke test
	run: ./do/do.sh -smoke

	- name: Staticcheck
	run: \|
	# need to disable because staticcheck doesn't work on go 1.16
	# and GitHub Actions still has 1.16
	# go install honnef.co/go/tools/cmd/staticcheck@latest
	# staticcheck ./... \|\| true

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