docs: clarify parallel job execution in CI example

[aviavraham]

Summary

Fixes #388

The CI example already demonstrates parallel execution (lint and test as separate jobs), but this wasn't obvious from reading the remediation output. Added an inline comment to make the parallelization explicit.

Test plan

• Linting passes
• No logic changes, documentation-only fix

🤖 Generated with Claude Code

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📈 Test Coverage Report

Branch	Coverage
This PR	73.8%
Main	73.8%
Diff	✅ +0%

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Coverage calculated from unit tests only