Update presentation slides and styles; modify author details and enha… #170

	# This is a basic workflow to help you get started with Actions

	name: 04 Variable Hierarchy

	# Controls when the workflow will run
	on:
	# Triggers the workflow on push or pull request events but only for the main branch
	push:
	branches: [main]
	pull_request:
	branches: [main]

	# Allows you to run this workflow manually from the Actions tab
	workflow_dispatch:

	env:
	Greeting: 'Hello'
	Location: 'Workflow'

	# A workflow run is made up of one or more jobs that can run sequentially or in parallel
	jobs:
	# This workflow contains a single job called "build"
	build:
	# The type of runner that the job will run on
	runs-on: ubuntu-latest
	env:
	Location: 'Job'

	# Steps represent a sequence of tasks that will be executed as part of the job
	steps:
	# Checks-out your repository under $GITHUB_WORKSPACE, so your job can access it
	- uses: actions/[email protected]

	# Runs a single command using the runners shell
	- name: Run a one-line script
	run: echo "$Greeting, $Name! from $Location"
	env:
	Name: 'World'
	Location: 'Step'
	build2:
	# The type of runner that the job will run on
	runs-on: ubuntu-latest

	# Steps represent a sequence of tasks that will be executed as part of the job
	steps:
	# Checks-out your repository under $GITHUB_WORKSPACE, so your job can access it
	- uses: actions/[email protected]

	# Runs a single command using the runners shell
	- name: Run a one-line script
	run: echo "$Greeting, $Name! from $Location"

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