allow more characters in slugs (#186)

Author: Rich-Harris

packages/site-kit/src/lib/markdown/utils.ts

@@ -51,7 +51,7 @@ export function slugify(title: string) {
 	return title
 		.toLowerCase()
 		.replace(/&.+;/g, '')
-		.replace(/[^a-z0-9-$]/g, '-')
+		.replace(/[^a-z0-9-$(.):<>]/g, '-')
 		.replace(/-{2,}/g, '-')
 		.replace(/^-/, '')
 		.replace(/-$/, '');