"Quote reply" should add one more new line to comment box

[lance6716]

Description

After clicking "quote reply", the comment box has these content

> quoted reply
⬅️ (here is my cursor)

But markdown format needs an empty line to separate quoted paragraph and text paragraph. It's better to have

> quoted reply

⬅️ (here is my cursor)

Screenshots

Gitea Version

1.23.7

Can you reproduce the bug on the Gitea demo site?

Yes

Operating System

No response

Browser Version

chrome 137.0.7151.69 (Official Build) (arm64)

[wxiaoguang]

It should have been fixed in 1.24

Fix: quoted replies incorrectly render user input as part of the quote #34216