Add missing backtick in comment

[xixishidibei]

Description

Add missing backtick in comment

Type of Change

• New feature
• Bug fix
• Breaking change
• Performance improvement
• Refactoring
• Dependency update
• Documentation update
• Tests

Which Components or Systems Does This Change Impact?

• Validator Node
• Full Node (API, Indexer, etc.)
• Move/Aptos Virtual Machine
• Aptos Framework
• Aptos CLI/SDK
• Developer Infrastructure
• Other (specify)

How Has This Been Tested?

Key Areas to Review

Checklist

• I have read and followed the CONTRIBUTING doc
• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I identified and added all stakeholders and component owners affected by this change as reviewers
• I tested both happy and unhappy path of the functionality
• I have made corresponding changes to the documentation

[trunk-io]

⏱️ 15m total CI duration on this PR

Job	Cumulative Duration	Recent Runs
rust-move-tests	9m	🟩
rust-cargo-deny	2m	🟩
general-lints	2m	🟩
check-dynamic-deps	1m	🟩
semgrep/ci	28s	🟩
file_change_determinator	10s	🟩
permission-check	4s	🟥
permission-check	2s	🟥
permission-check	2s	🟥
permission-check	2s	🟥

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[github-actions]

This issue is stale because it has been open 45 days with no activity. Remove the stale label, comment or push a commit - otherwise this will be closed in 15 days.