Add a horizontal scrollbar to the div container of multi programming language Code
As of
The code editor (Markdown) in the LeetCode solution area supports this syntax: displaying code in different programming languages using separate tabs
```Go []
lang1
```
```py []
lang2
```
```cpp []
lang3
```
However, when there are around 15 tabs, there is no horizontal scrollbar at the bottom, making it inconvenient for users to view.
This script adds a horizontal scrollbar to address this issue.