Clarify how to merge in ReleaseGuide.md #408

	name: Build and Test
	on:
	push:
	branches:
	- master
	- develop
	pull_request:
	paths:
	- '**'

	jobs:
	sdist:
	name: Build distribution
	runs-on: ubuntu-latest
	steps:
	- name: Checkout Repository
	uses: actions/checkout@v2
	- name: Set up Python
	uses: actions/setup-python@v1
	with:
	python-version: '3.x'
	- name: Install dependencies
	run: \|
	python -m pip install --upgrade pip
	pip3 install --break-system-packages setuptools wheel twine
	- name: Build distribution
	run: python3 setup.py sdist
	test:
	name: Run mock unit tests
	runs-on: ubuntu-latest
	container: benjaminrodenberg/fenics
	steps:
	- name: Checkout Repository
	uses: actions/checkout@v2
	- name: Install fake precice
	run: \|
	mkdir -p precice
	echo "from setuptools import setup" >> precice/setup.py
	echo "setup(name='pyprecice', version='3.0.0.0')" >> precice/setup.py
	pip3 install --break-system-packages ./precice/
	- name: Run unit tests
	run: python3 setup.py test -s tests.unit
	- name: Run integration tests
	run: python3 setup.py test -s tests.integration

Provide feedback