style(card prefab): 调整卡牌预制体的缩放、尺寸和填充模式

修改卡牌预制体的缩放比例从2.5改为2，调整宽高尺寸从78到125，将填充模式从0改为1以适配新尺寸

assets/resources/gui/element/card.prefab

@@ -2440,8 +2440,8 @@
     },
     "_lscale": {
       "__type__": "cc.Vec3",
-      "x": 2.5,
-      "y": 2.5,
+      "x": 2,
+      "y": 2,
       "z": 1
     },
     "_mobility": 0,
@@ -2468,8 +2468,8 @@
     },
     "_contentSize": {
       "__type__": "cc.Size",
-      "width": 78,
-      "height": 78
+      "width": 125,
+      "height": 125
     },
     "_anchorPoint": {
       "__type__": "cc.Vec2",
@@ -2510,7 +2510,7 @@
     },
     "_type": 0,
     "_fillType": 0,
-    "_sizeMode": 0,
+    "_sizeMode": 1,
     "_fillCenter": {
       "__type__": "cc.Vec2",
       "x": 0,