Add suffix v2 to 2.x documents #2708

	name: FISCO-BCOS-DOC
	on:
	push:
	branches-ignore:
	- "**-1.3"
	- "**-1.5"
	tags-ignore:
	- v1.*
	paths-ignore:
	- "Changelog.md"
	- "README.md"
	pull_request:
	# branches:
	# - '**'
	release:
	types: [published, created, edited]

	jobs:
	build:
	name: build
	runs-on: ${{ matrix.os }}
	strategy:
	matrix:
	os: [ubuntu-20.04]
	steps:
	- uses: actions/checkout@v2
	with:
	fetch-depth: 5
	- name: install Ubuntu dependencies
	if: runner.os == 'Linux'
	run: sudo apt install -y git curl openssl python3-setuptools
	- name: configure
	run: python --version && pip3 install -r requirements.txt
	- name: compile 2.x
	run: cd 2.x/ && make html
	- name: compile 3.x
	run: cd 3.x/zh_CN/ && make html
	- name: run tests
	run: bash .ci/ci_check.sh

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