Studio Kestra Nue: fix info.json layout macro reference (#13318)

Corrected the info.json file to reference LAYOUT_all instead of LAYOUT.

keyboards/studiokestra/nue/info.json

@@ -5,7 +5,7 @@
     "width": 15,
     "height": 5,
     "layouts": {
-        "LAYOUT":  {
+        "LAYOUT_all":  {
             "layout": [
                 {"x":0, "y":0}, 
                 {"x":1, "y":0},