update FOX regex to include Fox Sports replays

[ischmidt20]

IMPORTANT: PRs without the template will be CLOSED

Description of your pull request and other information

Fox has recently moved sports replays away from fox.com/watch and to foxsports.com/replays. This change updates the extractor to match these new URLs. Nothing in the extractor internals changes.

Template

Before submitting a pull request make sure you have:

• At least skimmed through contributing guidelines including yt-dlp coding conventions
• Searched the bugtracker for similar pull requests
• Checked the code with flake8 and ran relevant tests

In order to be accepted and merged into yt-dlp each piece of code must be in public domain or released under Unlicense. Check all of the following options that apply:

• I am the original author of this code and I am willing to release it under Unlicense
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What is the purpose of your pull request?

• Fix or improvement to an extractor (Make sure to add/update tests)
• New extractor (Piracy websites will not be accepted)
• Core bug fix/improvement
• New feature (It is strongly recommended to open an issue first)

Copilot Summary

🤖 Generated by Copilot at 535a086

Summary

🦊📺🔧

Improve FOX extractor by expanding URL pattern and supporting more video types. Update yt_dlp/extractor/fox.py accordingly.

_VALID_URL grows
To catch more foxes in watch
Autumn of content

Walkthrough

• Update the URL pattern to support more FOX videos (link)

[pukkandan]

Pls add a test (only_matching is fine)

[ischmidt20]

Test added @pukkandan