fix: use combat_power field on edit

src/pages/CharacterEditPage.tsx

@@ -37,11 +37,11 @@ export default function CharacterEditPage() {
 
     const handleUpdate = async () => {
         try {
-            await api.put(`/characters/${id}`, {
-                name,
-                server,
-                power: Number(combatPower)
-            })
+                await api.put(`/characters/${id}`, {
+                    name,
+                    server,
+                    combat_power: Number(combatPower)
+                })
             navigate('/characters')
         } catch {
             setError('캐릭터 수정에 실패했습니다.')