sync-diff-inspector: fix typo

[sgykfjsm]

What problem does this PR solve?

Fix typo: comparison -> comparison

What is changed and how it works?

Check List

Tests

• Unit test
• Integration test
• Manual test (add detailed scripts or steps below)
• No code

Code changes

• Has exported function/method change
• Has exported variable/fields change
• Has interface methods change
• Has persistent data change

Side effects

• Possible performance regression
• Increased code complexity
• Breaking backward compatibility

Related changes

• Need to cherry-pick to the release branch
• Need to update the documentation
• Need to be included in the release note

[CLAassistant]

All committers have signed the CLA.

[ti-chi-bot[bot]]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: dveeden

The full list of commands accepted by this bot can be found here.

The pull request process is described here

Needs approval from an approver in each of these files: - ~~[OWNERS](https://github.com/pingcap/tidb-tools/blob/master/OWNERS)~~ [dveeden] Approvers can indicate their approval by writing `/approve` in a comment Approvers can cancel approval by writing `/approve cancel` in a comment

[ti-chi-bot[bot]]

[LGTM Timeline notifier]

Timeline:

• 2024-05-23 08:42:07.499946876 +0000 UTC m=+2333881.257082442: :ballot_box_with_check: agreed by dveeden.
• 2024-05-24 18:15:51.877612058 +0000 UTC m=+2454705.634747625: :heavy_multiplication_x::repeat: reset by sgykfjsm.
• 2024-05-25 05:18:01.328216953 +0000 UTC m=+2494435.085352524: :ballot_box_with_check: agreed by dveeden.
• 2024-05-28 15:40:33.490727418 +0000 UTC m=+2790987.247862996: :heavy_multiplication_x::repeat: reset by ti-chi-bot[bot].
• 2024-05-28 15:59:17.864151469 +0000 UTC m=+2792111.621287034: :ballot_box_with_check: agreed by dveeden.