Add dependabot for antora dependency tracking #1

	# Copyright 2025 Matt Borland
Check failure on line 1 in .github/workflows/dependabot.yml View workflow run for this annotation GitHub Actions / .github/workflows/dependabot.yml Invalid workflow file `(Line: 5, Col: 1): Unexpected value 'version', (Line: 6, Col: 1): Unexpected value 'updates', (Line: 5, Col: 1): Required property is missing: jobs`
	# Distributed under the Boost Software License, Version 1.0.
	# (See accompanying file LICENSE_1_0.txt or copy at http://boost.org/LICENSE_1_0.txt)

	version: 2
	updates:
	- package-ecosystem: "npm"
	directory: "/doc"
	schedule:
	interval: "weekly"

Provide feedback