infra: upgrade circleci version to 2.1

[CallMeLeopoldo]

No description provided.

[gemini-code-assist]

Code Review

This pull request updates the CircleCI configuration version from 2 to 2.1 and ensures a newline at the end of the file. The review feedback notes that upgrading to version 2.1 deprecates the use of machine: true without an explicit image, and recommends specifying a modern machine image and resource class to prevent potential execution failures.

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[codacy-production]

Up to standards ✅

🟢 Issues 0 issues

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AI Reviewer: first review requested successfully. AI can make mistakes. Always validate suggestions.

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[codacy-production]

Pull Request Overview

The PR successfully updates the CircleCI configuration version to 2.1. Codacy analysis indicates the changes are up to standards with no new quality issues or complexity increases.

However, the PR lacks a description explaining the motivation for the upgrade or the specific features intended for use. Additionally, there is no evidence that the new configuration has been validated using the CircleCI CLI. While there are no major blockers or security flaws, addressing the empty description and performing syntax validation is recommended.

About this PR

• The PR description is empty. Please provide context on the motivation for upgrading to CircleCI 2.1 and whether specific modern features (like orbs or reusable commands) are planned for immediate use.

Test suggestions

• Validate CircleCI configuration syntax using 'circleci config validate'

Prompt proposal for missing tests

Consider implementing these tests if applicable:
1. Validate CircleCI configuration syntax using 'circleci config validate'

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