Add Ameliorate to repositories.toml

[keyserj]

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ℹ️ Repository information

Repo: https://github.com/amelioro/ameliorate

The repository has:

• [x] At least three issues with the good first issue label. (Good First Issues list)
• [x] At least 10 contributors.
• [x] Detailed setup instructions for the project. (CONTRIBUTING.md#running-the-project)
• [x] CONTRIBUTING.md (CONTRIBUTING.md)
• [x] Actively maintained.

Cheers