Fix typo in docs #75



	name: Build container

	on:
	push:
	branches:
	- main
	workflow_dispatch:

	concurrency:
	group: build

	jobs:
	build:
	runs-on: ubuntu-20.04
	name: Build container
	steps:
	-
	name: Set variables
	id: vars
	run: \|
	USERNAME="$(echo "$GITHUB_REPOSITORY_OWNER" \| tr '[:upper:]' '[:lower:]')"
	echo "::set-output name=repo::ghcr.io/${USERNAME}/dispmanx"
	echo "::set-output name=username::${USERNAME}"
	-
	name: Checkout
	uses: actions/checkout@v3
	-
	name: Set up Docker Buildx
	uses: docker/setup-buildx-action@v2
	-
	name: Set up QEMU
	uses: docker/setup-qemu-action@v2
	-
	name: Login to Github Container Registry
	uses: docker/login-action@v2
	with:
	registry: ghcr.io
	username: ${{ steps.vars.outputs.username }}
	password: ${{ secrets.GITHUB_TOKEN }}
	-
	name: Build and push
	uses: docker/build-push-action@v3
	with:
	push: true
	platforms: linux/arm64,linux/arm/v7
	tags: ${{ steps.vars.outputs.repo }}:latest
	cache-from: type=registry,ref=${{ steps.vars.outputs.repo }}-cache:cache
	cache-to: type=registry,ref=${{ steps.vars.outputs.repo }}-cache:cache,mode=max

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