fix: resolve broken links in GetStartedSection

[onkar717]

📌 Fixes

Fixes # (Use "Fixes", "Closes", or "Resolves" for automatic closing)

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📝 Summary of Changes

Fixes two broken links in the documentation website that were preventing proper navigation.

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Changes Made

GetStartedSection.tsx: Fixed API Reference link by adding leading slash (/docs/use-integrate/kubestellar-api/control) to ensure it works as an absolute path from any route

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Checklist

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• I have reviewed the project's contribution guidelines.
• I have written unit tests for the changes (if applicable).
• I have updated the documentation (if applicable).
• I have tested the changes locally and ensured they work as expected.
• My code follows the project's coding standards.

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