Fix broken links in README.md (Maintenance)

[parthakhare1812]

Description

I was reviewing the project list and noticed that johannilsson/android-pulltorefresh is officially deprecated by its author and is no longer recommended for modern Android development.

To keep this curated list high-quality and up-to-date for new developers, I have removed this link.

Changes Made

• Removed deprecated johannilsson/android-pulltorefresh from the UI section.
• (Optional) Checked 2 other links in the "UI" section to ensure they are active.

Related Issue

Closes #350 (Broken/Deprecated Links)

[Benard1961]

Hi, I'm Fabian, this issue is still available?

[Benard1961]

Hi, I'm Fabian, this issue is still available?

[houpe]

***@***.***

[hzhzhen]

这是一封自动回复邮件。已经收到您的来信，我会尽快回复。

[itMrc]

您的邮件小林已收到，谢谢。