Update badge.md with mpy-cross usage instructions #51

	# On file change, update submodule of sigpwny/notes.sigpwny.com using a CI bot commit.
	name: Sync notes changes to sigpwny/notes.sigpwny.com
	on: push
	concurrency:
	group: ${{ github.workflow }}-${{ github.ref }}
	cancel-in-progress: true
	jobs:
	update:
	name: Update git submodule
	runs-on: ubuntu-latest
	steps:
	- name: Install SSH Client 🔑
	uses: webfactory/[email protected]
	with:
	ssh-private-key: ${{ secrets.DEPLOY_KEY }}
	- name: Checkout
	uses: actions/checkout@v4
	with:
	repository: sigpwny/notes.sigpwny.com
	submodules: true
	- name: Pull & update submodules recursively
	run: \|
	git submodule update --init --recursive
	git submodule update --recursive --remote
	- name: Commit
	run: \|
	git config user.email "[email protected]"
	git config user.name "SIGPwny CI/CD"
	git add --all
	git commit -m "sync: sigpwny/notes" \|\| echo "No changes to commit"
	git push

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