Tolerate some identifiers. Should fix #1063

common/src/main/java/us/myles/ViaVersion/protocols/protocol1_13to1_12_2/packets/InventoryPackets.java

@@ -447,7 +447,7 @@ public class InventoryPackets {
             case "WDL|REQUEST":
                 return "wdl:request";
             default:
-                return old.matches("[0-9a-z_-]+:[0-9a-z_/.-]+") // Identifier regex
+                return old.matches("([0-9a-z_-]*:)?[0-9a-z_/.-]*") // Identifier regex
                         ? old
                         : "viaversion:legacy/" + BaseEncoding.base32().lowerCase().withPadChar('-').encode(
                         old.getBytes(StandardCharsets.UTF_8));