Update README.md with submodule step #9

	name: automatic-release-ubuntu-gnu

	on:
	push:
	branches:
	- main
	- feature/automatic-releases


	jobs:

	builds-and-test:
	runs-on: ubuntu-latest

	steps:
	- name: Checkout
	uses: actions/checkout@v4
	with:
	submodules: 'recursive'

	- name: Setup ninja
	uses: seanmiddleditch/gha-setup-ninja@master

	- name: Install required packages
	run: \|
	sudo apt install libhdf5-dev libopenmpi-dev

	- name: Build application
	run: \|
	cmake -S . -B build -G Ninja -DCMAKE_BUILD_TYPE=Release
	cmake --build build -j

	- name: Run fdtd unit tests
	run: \|
	build/bin/fdtd_tests

	- name: Install python wrapper requirements
	run: \|
	python -m pip install -r requirements.txt

	- name: Run wrapper tests
	run: \|
	python -m pytest test

	- name: Get current date
	id: date
	run: echo "::set-output name=date::$(date +'%Y-%m-%d')"

	- name: Creating archive
	run: \|
	tar -czvf semba-fdtd-ubuntu-gnu.tar.gz build/bin/* LICENSE

	- name: Generating release
	uses: "marvinpinto/action-automatic-releases@latest"
	with:
	repo_token: "${{ secrets.GITHUB_TOKEN }}"
	automatic_release_tag: "latest-ubuntu-gnu"
	prerelease: false
	title: "${{ steps.date.outputs.date }} Ubuntu GNU dev. build"
	files: \|
	semba-fdtd-ubuntu-gnu.tar.gz

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