docs: fix example json in template.md #130

	name: build
	on: [push, pull_request]
	jobs:
	build:
	strategy:
	matrix:
	go-version: [1.14.x, 1.15.x]
	os: [ubuntu-latest, macos-latest, windows-latest]

	runs-on: ${{ matrix.os }}

	steps:
	- uses: actions/checkout@v2
	- uses: actions/setup-go@v2
	with:
	go-version: ${{ matrix.go-version }}
	id: go

	- name: Build
	run: go build -v

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

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