fix: remove dollar sign from linux install scripts

[rolznz]

If you copy the whole line then it will fail.

Summary by CodeRabbit

• Documentation
  • Updated Linux ARM64 and x86_64 installation instructions to make commands easier to copy and run by removing the shell prompt marker.

[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: defaults

Review profile: CHILL

Plan: Pro Plus

Run ID: 023ff8eb-42be-4582-8a0f-d9ce4372405e

📥 Commits

Reviewing files that changed from the base of the PR and between 6d0cb6f and fc3189d.

📒 Files selected for processing (2)

• scripts/linux-aarch64/README.md
• scripts/linux-x86_64/README.md

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📝 Walkthrough

Walkthrough

The Linux ARM64 and x86_64 README installation commands no longer include the leading $ shell prompt marker.

Changes

Linux installation documentation

Layer / File(s)	Summary
Installation command examples scripts/linux-aarch64/README.md, scripts/linux-x86_64/README.md	The ARM64 and x86_64 installation commands now show only the executable command without the $ prompt marker.

Estimated code review effort: 1 (Trivial) | ~2 minutes

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title clearly describes the main change: removing the dollar sign from Linux installation commands.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch fix/remove-dollar-sign-from-install-script

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