fix(技能): 调整蓝波和冰刺技能配置及死亡特效位置

- 移除蓝波技能(6201)和冰刺技能(6207)的冰冻率(frz从20改为0)
- 调整死亡技能特效(death.prefab)的垂直位置(y从20改为30)和缩放比例(从0.7改为0.65)

assets/resources/game/skill/end/dead.prefab

@@ -90,7 +90,7 @@
     "_lpos": {
       "__type__": "cc.Vec3",
       "x": 0,
-      "y": 20,
+      "y": 30,
       "z": 0
     },
     "_lrot": {
@@ -102,8 +102,8 @@
     },
     "_lscale": {
       "__type__": "cc.Vec3",
-      "x": 0.7,
-      "y": 0.7,
+      "x": 0.65,
+      "y": 0.65,
       "z": 1
     },
     "_mobility": 0,