Update happycommits.json

[csmlo]

Adding DataKind to FGFI - https://github.com/datakind/Data-Observation-Toolkit

[Copilot]

Pull Request Overview

This PR adds DataKind's Data-Observation-Toolkit to the For Good First Issue (FGFI) list, expanding the collection of social good projects available to new contributors.

• Adds one new repository to the FGFI collection
• Repository appears to meet FGFI requirements based on the checklist in the description

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