docs: update llama.cpp links from ggerganov to ggml-org

[nightcityblade]

Related Issues

• fixes Update links in llama.cpp documentation pages #10960

Proposed Changes:

The llama.cpp repository was moved from ggerganov/llama.cpp to ggml-org/llama.cpp. While GitHub redirects still work, the documentation should point to the canonical URL.

Updated all 20 occurrences across docs-website (current and versioned docs) from https://github.com/ggerganov/llama.cpp to https://github.com/ggml-org/llama.cpp.

How did you test it?

Verified with grep that no ggerganov/llama.cpp references remain in the codebase, and that ggml-org/llama.cpp is the correct current location.

Notes for the reviewer

Only documentation link updates, no code changes.

Checklist

• I have read the contributors guidelines and the code of conduct.
• I have updated the related issue with new insights and changes.
• I have added unit tests and updated the docstrings.
• I've used one of the conventional commit types for my PR title: docs:
• I have documented my code.
• I have added a release note file, following the contributors guidelines.
• I have run pre-commit hooks and fixed any issue.

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[anakin87]

Already done in #10964