docs: add Duartegdm as a contributor for doc

[allcontributors]

Adds @Duartegdm as a contributor for doc.

This was requested by iluwatar in this comment

[skip ci]

[github-actions]

PR Summary

Added Gabriel Duarte as a contributor for documentation to the project. Updated the .all-contributorsrc file to include Duartegdm's contribution and updated the README.md file to reflect the change in the total number of contributors and to add Duartegdm to the contributors' table.

Changes

File	Summary
.all-contributorsrc	Added Gabriel Duarte (Duartegdm) as a contributor with doc contribution type. Updated the contributors list to include his information, such as his GitHub profile URL and avatar.
README.md	Updated the All Contributors badge to reflect the new total count of contributors (increased by one). Added Gabriel Duarte to the contributors table with a link to his GitHub profile and indicating his documentation contributions.

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autogenerated by presubmit.ai

[github-actions]

✅ LGTM!

Review Summary

Commits Considered (2)

• 8b49efa: docs: update .all-contributorsrc [skip ci]
• 2aa1c84: docs: update README.md [skip ci]

Files Processed (2)

• .all-contributorsrc (1 hunk)
• README.md (2 hunks)

Actionable Comments (0)

Skipped Comments (0)

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud