Update Overview.md

[sosoxuc]

Fix documentation

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Note

Low Risk
Documentation-only edits that adjust example values; no code or behavioral changes.

Overview
Fixes typos in docs/Overview.md order examples by correcting the takerAsset values in the Scenario 2 (MINT) and Scenario 3 (MERGE) pseudo-JSON (removing stray apostrophes so assets match A' and C).

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