Fix invalid markup and manifest files

[Sidharthwin]

Closes #6364

Description

While reviewing the repository, I noticed a few syntax issues in different files that were causing validation/formatter errors. These were not formatting-related, but actual HTML/JSON inconsistencies.

This PR fixes those issues to ensure proper syntax and improve overall code quality.

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Changes Made

• Fixed invalid JSON in manifest.webapp

  • Removed incorrect closing brace and adjusted commas to ensure valid JSON structure.

• Resolved duplicate closing tag in planet/index.html

  • Removed extra </li> tag that was causing invalid HTML.

• Removed stray closing tag in Docs/guide-es/index.html

  • Deleted an unmatched </p> tag that was breaking the HTML structure.

• Corrected table structure in Docs/guide-pt/index.html

  • Wrapped <td> elements inside a proper <tr> to maintain valid table hierarchy.

• Ensured proper HTML document structure

  • Fixed closing tags where necessary to maintain well-formed HTML.

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Impact

• Prevents formatter/linting failures
• Ensures valid HTML and JSON syntax
• Improves maintainability and consistency across the codebase

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Notes

All changes were kept minimal and focused only on fixing syntax issues without altering functionality.

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• Bug Fix

[github-actions]

✅ All Jest tests passed! This PR is ready to merge.

[Sidharthwin]

Hi, @Ashutoshx7 , @vyagh and @omsuneri pls check I’ve fixed the identified syntax issues and verified the changes locally.
Please let me know if any improvements or changes are needed.

[mahesh-09-12]

@Sidharthwin nice cleanup, fixing invalid HTML/JSON is definitely useful, since some of these changes touch structure (like table rows and closing tags), did you verify there’s no visible impact on rendering (especially in the docs pages)? also, was this validated with any HTML/JSON validator or just manual fixes?