doc: minor updates to help doc #593

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

	name: No PRs to Release Branches

	# Controls when the workflow will run
	on:
	# Triggers the workflow on push or pull request events but only for the v1.x branch
	pull_request:
	types: [opened, edited, ready_for_review]

	# 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"
	check_target:
	# 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:
	# Runs a single command using the runners shell
	- name: Fail when targeting v2
	run: \|
	target=${{ github.base_ref }}
	echo "Target is: $target"
	if [[ $target == "v2.x" ]]; then
	echo "PRs must target main"
	exit 1
	else
	exit 0
	fi

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