News' "add this RSS feed" button should handle multiple feeds

[Francois Marier]

https://feeding.cloud.geek.nz/ offers two feeds:

<link rel="alternate" type="application/rss+xml" title="Feeding the Cloud (RSS feed)" href="index.rss" />
<link rel="alternate" type="application/atom+xml" title="Feeding the Cloud (Atom feed)" href="index.atom" />

and we display them both with the same title when clicking the feed button in the URL bar.

Steps to Reproduce

1. Enable Brave News.
2. Go to https://feeding.cloud.geek.nz/
3. Click the feed icon in the URL bar.

Actual result:

Expected result:

Either we should give some indication to the user as to how these two feeds are different, or merge them (i.e. show only one of them).

Brave version (brave://version info)

Brave	1.65.132 Chromium: 124.0.6367.202 (Official Build) (64-bit) 
Revision	ef7b9d19db96d7f4363674bbcd02b74c5f055091
OS	Linux