docs: fix typos and correct metadata filename

[pratik-mahalle]

Description

This PR addresses documentation quality issues identified during a comprehensive documentation audit conducted by me:

• Fixed filename typo: Renamed metadada.md to metadata.md to correct the unprofessional URL path (/documentation/references/metadada/ → /documentation/references/metadata/)
• Updated all internal links: Fixed 7 references across the documentation to point to the corrected filename
• Corrected spelling errors: Fixed 4 typos across 3 files:
  • ephemral → ephemeral (getting-started.md)
  • archutecture → architecture (container-images.md)
  • Miniong → Minion (troubleshoot/_index.md)
  • environement → environment (troubleshoot/_index.md)

Impact: Improves documentation professionalism, fixes URL consistency, and enhances overall readability.

Testing: All updated links verified to point to existing files. No broken references remain.

Related issue(s)

[pratik-mahalle]

Hey @lbroudoux , In this pr I only updated the some minor file issues and I don't know why netlify deploy-preview is failed :)