Add newline at end of architecture.md

[pathum25]

Added a newline at the end of architecture.md

Description

Issue(s) fixed

Fixes #

Preview

Checklist

• If this PR updates or adds documentation content that changes or adds technical meaning, it has received an approval from an engineer or DevRel from the relevant team.
• If this PR updates or adds documentation content, it has received an approval from a technical writer.

External contributor checklist

• I've read the contribution guidelines.
• I've created a new issue (or assigned myself to an existing issue) describing what this PR addresses.

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Note

Low Risk
Whitespace-only documentation edit with no functional or security impact.

Overview
Adds a trailing newline at the end of metamask-connect/architecture.md so the file follows common EOF conventions. No documentation content or links are changed.

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