feat: upgrade autoprefixer from 9.8.6 to 10.4.20

Snyk has created this PR to upgrade autoprefixer from 9.8.6 to 10.4.20.

See this package in npm:
autoprefixer

See this project in Snyk:
https://app.snyk.io/org/cachiman/project/d59419ac-e80e-4d3f-a27d-55791dd9faf6?utm_source=github&utm_medium=referral&page=upgrade-pr

plugins/woocommerce/client/legacy/package.json

@@ -19,7 +19,7 @@
 	"devDependencies": {
 		"@types/node": "^16.18.68",
 		"@wordpress/stylelint-config": "^21.36.0",
-		"autoprefixer": "9.8.6",
+		"autoprefixer": "10.4.20",
 		"browserslist": "4.19.3",
 		"caniuse-lite": "1.0.30001146",
 		"grunt": "1.3.0",