Preonic rev. 3: fix info.json file

File was saved with an invalid JSON structure.

keyboards/preonic/rev3/info.json

@@ -262,8 +262,8 @@
       ]
     },
     "LAYOUT_ortho_5x12": {
-      "layout": [
       "key_count": 60,
+      "layout": [
         {"label":"k00", "x":0, "y":0},
         {"label":"k01", "x":1, "y":0},
         {"label":"k02", "x":2, "y":0},