S65-Plus: fix layout macro name in info.json (#4728)

keyboards/s65_plus/info.json

@@ -5,7 +5,7 @@
   "width": 18,
   "height": 5,
   "layouts": {
-    "LAYOUT": {
+    "LAYOUT_ansi": {
       "layout": [
         {"label":"F1", "x":0, "y":0},
         {"label":"F2", "x":1, "y":0},