fix: read default tag from environment variables #4

	# name: Aurora Beta
	# on:
	# # merge_group:
	# # pull_request:
	# # branches:
	# # - main
	# # - testing
	# # paths-ignore:
	# # - "**.md"
	# # - "system_files/silverblue/**"
	# # push:
	# # branches:
	# # - main
	# # paths-ignore:
	# # - "**.md"
	# # - "system_files/silverblue/**"
	# # schedule:
	# # - cron: "40 4 * * *" # 4:40 UTC everyday
	# workflow_dispatch:

	# jobs:
	# build:
	# name: build
	# uses: ./.github/workflows/reusable-build.yml
	# secrets: inherit
	# with:
	# brand_name: aurora
	# fedora_version: beta

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