Sort contributor listings alphabetically by first name

[Copilot]

This PR sorts the contributor listings in README.md alphabetically by first name as requested in the issue.

Changes Made

• Approvers section: Reordered the list to be alphabetical by first name:

  • Moved Aryan Ishan from the end to the beginning of the list
  • Final order: Aryan, DEBAJIT, Johannes, Josh, Kumar, Max, Siim, Tobias, Tomasz

• Maintainers section: Already correctly sorted by first name (Ehsan, Lalit, Marc, Tom) - no changes needed

Analysis

• Searched both README.md and CONTRIBUTING.md for maintainer, approver, triager, and emeritus member listings
• Found only maintainers and approvers sections in README.md
• No emeritus members or triagers sections exist to sort
• CONTRIBUTING.md contains no contributor listings requiring sorting
• No company affiliations needed to be removed from emeritus members (none found)

The change is minimal and surgical - only one line was moved to achieve the required alphabetical ordering.

Fixes #15.

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