docs: fix broken doc links and anchors in blog, contributing, and architecture

[supunyasanthaofficial]

Summary

This PR resolves several broken links and anchors detected by Docusaurus during the production site build:

1. Release Levels URL :

• In website/blog/2026-10-19-react-native-0.88.mdx and website/blog/2025-10-08-react-native-0.82.mdx, links pointing to /docs/releases/release-levels were broken because release-levels.md lives at /docs/release-levels. Updated links to /docs/release-levels.

2. Versioning Policy URL :

• In website/contributing/contributing-overview.mdx, the link pointing to /docs/releases/versioning-policy resulted in a 404 because the releases plugin route base path is /releases. Updated to /releases/versioning-policy.

3. Fabric Renderer Anchor :

• In website/architecture/fabric-renderer.md, the link architecture-glossary.md#fabric-render was missing the trailing er. Updated to architecture-glossary.md#fabric-renderer matching the heading ## Fabric Renderer.

Test plan

• Run ESLint: npx eslint website/blog/2026-10-19-react-native-0.88.mdx website/blog/2025-10-08-react-native-0.82.mdx website/contributing/contributing-overview.mdx website/architecture/fabric-renderer.md
• Run Docusaurus build: verified [WARNING] Docusaurus found broken links! is completely resolved.

[Simek]

Hello, as mentioned above, not all links are broken. Let's leave the hash link correction, and conversion to internal link, and revert the rest for now.

[Simek]

Thanks for the quick update, let's ship it! 🚀