Add `loading` prop for `Button` and `IconButton` #1744

	name: Changesets
	'on':
	pull_request:
	types: [opened, synchronize, reopened, labeled, unlabeled]

	jobs:
	validate:
	runs-on: ubuntu-latest
	steps:
	- uses: actions/checkout@v4
	with:
	fetch-depth: 0
	- name: Set up Node.js
	uses: actions/setup-node@v3
	with:
	node-version: 18
	cache: 'npm'
	- name: Install dependencies
	run: npm ci
	# This step generates the generated/components.json file expected by the
	# validator action
	- name: Build
	run: npm run build
	- uses: gr2m/primer-release-changesets-validator-action@v1

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