lint.sh: accept type: select as a valid requirement type

Matches portal's new resource-backed multi/single-select requirement
kind.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

lint.sh

@@ -39,14 +39,14 @@ for f in "$dir"/*.yaml; do
 		fail=1
 	fi
 
-	# "textarea", "file", and "prosekit" are the three values
+	# "textarea", "file", "prosekit", and "select" are the four values
 	# content.rs/app.rs special-case; anything else is passed straight
 	# through as an HTML <input type> attribute, so this is the real set
 	# of valid values, not a guess.
 	bad_types=$(jq -r '
 		[.alternatives[]?.features[]?.requirements[]?
 			| select(.type != null and (.type | IN(
-				"text", "textarea", "file", "prosekit", "email", "tel", "url",
+				"text", "textarea", "file", "prosekit", "select", "email", "tel", "url",
 				"number", "password", "date", "datetime-local", "time", "month",
 				"week", "color", "range", "checkbox", "radio", "hidden", "search"
 			) | not))