Slack notifications should be updated in ci-templates

[jakewrfoster]

Description

create-wordpress-project/ci-templates/.github/workflows/copy-to-vip.yml

Lines 28 to 33 in 7f22e6a

	- name: Notify Slack
	if: always()
	uses: alleyinteractive/action-notify-slack@develop
	with:
	status: ${{ job.status }}
	webhook_url: ${{ secrets.SLACK_WEBHOOK_URL }}

The CI Template files still rely on Slack webhooks, but our latest best practice is to use Automatey or Alleybot to handle the webhooks: https://docs.alley.com/technology/server-operations/slack-notifications/

Use Case

Removing the Slack deploy workflows from our actions will reduce the amount of cruft (often unused on newer projects) from our templates.