Add a cache for samples #3989

	---
	name: checks
	'on': [push, pull_request]
	concurrency:
	group: ${{ github.workflow }}-${{ github.ref }}
	cancel-in-progress: true
	jobs:
	scripted-checks:
	runs-on: ubuntu-latest
	steps:
	- uses: actions/checkout@v2
	- name: Install python-tinycss2
	run: sudo apt-get install -y python3-tinycss2
	- name: Update submodules
	run: git submodule update --init --recursive
	- name: Verify scripted tests
	run: tests/scripted/verify
	- name: Run check-strings
	run: tests/scripted/check-strings
	- name: Run check-namespace
	run: tests/scripted/check-namespace
	shellcheck:
	runs-on: ubuntu-latest
	container: koalaman/shellcheck-alpine:v0.9.0
	steps:
	- name: Check out
	uses: actions/checkout@v3
	- name: Run shellcheck
	run: \|
	shellcheck \
	$(find "./cmake/" -type f -name '.sh' -o -name ".sh.in") \
	doc/bash-completion/lmms \
	buildtools/update_locales
	yamllint:
	runs-on: ubuntu-latest
	steps:
	- name: Check out
	uses: actions/checkout@v3
	- name: Run yamllint
	run: for i in $(git ls-files '*.yml'); do yamllint $i; done

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