修复生成字母bug

src/main/java/com/example/catchTheLetters/service/impl/RoomServiceImpl.java

@@ -144,7 +144,7 @@ public class RoomServiceImpl implements RoomService {
         if (val == 0)
             // 回血爱心
             letter = new Letter("10", random.nextFloat(1), random.nextFloat(2, 6));
-        if (val >= 1 && val <= 81)
+        else if (val <= 81)
             // 从当前单词中随机选择一个字母
             letter = new Letter(words.keySet().toArray()[random.nextInt(words.size())].toString(), random.nextFloat(1), random.nextFloat(2, 6));
         else