boardsource/beiwagon: correct QMK Configurator layout data (#17771)

keyboards/boardsource/beiwagon/info.json

@@ -55,9 +55,9 @@
         { "matrix": [2, 0], "x": 0, "y": 2 },
         { "matrix": [2, 1], "x": 1, "y": 2 },
         { "matrix": [2, 2], "x": 2, "y": 2 },
-        { "matrix": [3, 0], "x": 0, "y": 2 },
-        { "matrix": [3, 1], "x": 1, "y": 2 },
-        { "matrix": [3, 2], "x": 2, "y": 2 }
+        { "matrix": [3, 0], "x": 0, "y": 3 },
+        { "matrix": [3, 1], "x": 1, "y": 3 },
+        { "matrix": [3, 2], "x": 2, "y": 3 }
       ]
     }
   }