fix: wn_cross blink wnsignal.json

The blinking light was forgotten in the last update. 
I have seen this and have fixed it.

src/main/resources/assets/opensignals/modeldefinitions/wnsignal.json

@@ -83,10 +83,11 @@
                 {
                     "blockstate":"hasandis(WNTYPE) && with(WNCROSS.BLINK)",
                     "retexture":{
-                        "lamp_1": "lamp_white_blink"
+                        "lamp_1_north":"lamp_white_blink",
+                        "lamp_1_south":"lamp_white_blink",                        
                     }
                 }
             ]
         }
     }
-}
+}