docs: Update links and license information in README

[eaccmk]

• Docs: fix outdated link for Open WebUI integration old one was taking users to - 404 Page
• Docs: Enhance license linking

Pull Request Checklist

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• Description: Provide a concise description of the changes made in this pull request.
• Changelog: Ensure a changelog entry following the format of Keep a Changelog is added at the bottom of the PR description.
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Changelog Entry

Description

• This pull request updates documentation links to improve accuracy and usability. It fixes an outdated Open WebUI integration link that previously led to a 404 page and enhances license linking to ensure users can easily access correct licensing information.

Changed

• fixed outdated link and updated license link

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Screenshots or Videos

Old Link was https://docs.openwebui.com/openapi-servers/open-webui/ was giving 404