Tweak repo sidebar (#32847)

Before and after:

<img width="218" alt="Screenshot 2024-12-15 at 04 53 53"
src="https://github.com/user-attachments/assets/299b1f0a-ba72-47c6-b662-a9d540d4d741"
/>
<img width="222" alt="Screenshot 2024-12-15 at 04 53 41"
src="https://github.com/user-attachments/assets/5a2b5332-e324-4d20-82e9-21d1c850e826"
/>

Diff without whitespace:
https://github.com/go-gitea/gitea/pull/32847/files?diff=unified&w=1

The `tw-mt-2` is fine even if the element renders empty:

<img width="387" alt="image"
src="https://github.com/user-attachments/assets/76a976e4-ba2e-48a5-9248-c361552a937a"
/>

---------

Co-authored-by: wxiaoguang <wxiaoguang@gmail.com>

options/locale/locale_en-US.ini

@@ -2632,6 +2632,7 @@ release.new_release = New Release
 release.draft = Draft
 release.prerelease = Pre-Release
 release.stable = Stable
+release.latest = Latest
 release.compare = Compare
 release.edit = edit
 release.ahead.commits = <strong>%d</strong> commits