Added siglens/siglens project to repositories.toml

[SaifuddinSaifee]

ℹ️ Repository information

The repository has:

• [x] At least three issues with the good first issue label.
• [x] At least 10 contributors.
• [x] Detailed setup instructions for the project.
• [x] CONTRIBUTING.md
• [x] Actively maintained.

Siglens GitHub Repo: https://github.com/siglens/siglens Siglens GitHub Issues: https://github.com/siglens/siglens/issues SigLens Website: https://www.siglens.com/

[vercel[bot]]

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