Fix the meaning of the blue led at readme #318

	name: hdzero-vtx build
	on: [push, pull_request]
	jobs:
	targets:
	runs-on: ubuntu-latest
	outputs:
	targets: ${{ steps.set-targets.outputs.targets }}
	steps:
	- name: Checkout
	uses: actions/checkout@v3
	- id: set-targets
	run: echo "targets=[$(grep -r "\[env:" targets/.ini \| sed 's/.:$.$]./"\1"/' \| tr '\n' ',')]" >> $GITHUB_OUTPUT

	build:
	needs: targets
	strategy:
	fail-fast: false
	matrix:
	target: ${{fromJSON(needs.targets.outputs.targets)}}
	runs-on: ubuntu-latest
	steps:
	- name: Inject slug/short variables
	uses: rlespinasse/github-slug-action@v4

	- name: Checkout
	uses: actions/checkout@v3

	- name: Set up Python
	uses: actions/setup-python@v4
	with:
	python-version: '3.9'

	- name: Cache pip
	uses: actions/cache@v3
	with:
	path: ~/.cache/pip
	key: ${{ runner.os }}-pip-${{ matrix.target }}

	- name: Install PlatformIO
	run: \|
	python -m pip install --upgrade pip
	pip install platformio

	- name: Cache PlatformIO
	uses: actions/cache@v3
	with:
	path: ~/.platformio
	key: ${{ runner.os }}-platformio

	- name: Build
	run: \|
	platformio platform update
	platformio platform install native
	rm -rf .pio
	platformio run -e ${{ matrix.target }}

	- name: Upload Artifacts
	uses: actions/upload-artifact@v3
	with:
	name: ${{ matrix.target }}
	path: .pio/build/${{ matrix.target }}/HDZERO_TX.bin

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