Update README.md #37

	name: Linux Build
	on: [push]

	jobs:
	build:
	name: ubuntu-build
	runs-on: ubuntu-latest
	steps:
	- uses: actions/checkout@v3
	with:
	submodules: recursive

	- name: install wxwidgets
	run: \|
	sudo apt install libgtk-3-dev cmake libtbb-dev
	git clone https://github.com/wxWidgets/wxWidgets.git --recurse-submodules
	cd wxWidgets
	mkdir buildgtk
	cd buildgtk
	../configure --with-gtk
	make -j4
	sudo make install
	sudo ldconfig
	cd ..
	cd ..

	- name: build
	run: \|
	cd demo
	cmake ./
	make -j4

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