fix: 별 사이즈 수정

Author: JKyEun

src/routes/mission/-components/MissionGridCard.tsx

@@ -199,7 +199,7 @@ export default function MissionGridCard({
                         <img
                           src="/score-star.png"
                           alt="score-star"
-                          className="w-2.5 h-2.5"
+                          className="w-3 h-3"
                         />
                         +{score}
                       </p>