docs: Improve Clarity and Grammar Update experimentation-with-citizen…

[0xsimka]

Description

This update refines a sentence in the "Experimentation with Citizenship" document to improve its clarity and grammatical accuracy. The original phrasing, "mistakes are learned from," was identified as awkward and inconsistent with standard English usage.

The revised version:

"Changes that have an undesirable effect are rolled back, and mistakes are used as learning opportunities to inform future improvements."

This change ensures the text reads naturally and aligns with the professional tone of the document while preserving its original intent.

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