Able to detect 1.20.1 servers

src/main/java/io/github/retrooper/packetevents/utils/server/ServerVersion.java

@@ -46,7 +46,8 @@ public enum ServerVersion {
     v_1_18(757), v_1_18_1(757), v_1_18_2(758),
     //TODO Update (checkpoint)
     v_1_19(759), v_1_19_1(760), v_1_19_2(760), v_1_19_3(761), v_1_19_4(762),
-    v_1_20(763),
+    //Same protocol version
+    v_1_20(763), v_1_20_1(763),
     ERROR(-1);
 
     private static final String NMS_VERSION_SUFFIX = Bukkit.getServer().getClass().getPackage().getName()