Update K3 Pico power adapter requirements

[junlin-luo-spacemit]

Summary

Updates the K3 Pico-ITX user guides in Chinese and English to document the CCC-certified power-adapter requirement.

The V1.1 revision-history entries now also record this requirement.

Validation

• git diff --check

[github-actions]

📝 Doc-Review Agent Report

zh/k3_pico/pico_user_guide.md

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⚠️ This is an automated review. It never blocks merge.