Please describe the bug

Package Collection URL doesn't work.

Explain the steps needed to reproduce the bug

1. Navigate to Packages authored by Artem Novichkov
2. Copy Package Collection URL https://swiftpackageindex.com/artemnovichkov/collection.json
3. Paste the URL into Xcode during collection adding flow.

Got an error:
"Received invalid response at https://swiftpackageindex.com/artemnovichkov/collection.json. Please make sure it is a package collection URL."

What was the expected behaviour?

The collection added successfully.

Screenshots

I use Xcode 26.0 (17A324).