TiCDC: Fixup formatting of ticdc-upstream-downstream-check.md

[dveeden]

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[gemini-code-assist]

Summary of Changes

Hello @dveeden, I'm Gemini Code Assist¹! I'm currently reviewing this pull request and will post my feedback shortly. In the meantime, here's a summary to help you and other reviewers quickly get up to speed!

This pull request focuses on enhancing the readability and consistency of the ticdc-upstream-downstream-check.md documentation file. The changes involve minor formatting adjustments to a table within a code block and ensuring the file adheres to standard practices by ending with a newline character. These updates contribute to a cleaner and more professional documentation experience.

Highlights

• Documentation Formatting: Improved readability of a documentation table by adjusting column spacing within a code block.
• File Termination: Ensured proper file termination by adding a newline character at the end of the document.

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[gemini-code-assist]

Code Review

This pull request fixes some formatting issues in ticdc-upstream-downstream-check.md. The alignment of the example SQL output is corrected, and a missing newline at the end of the file is added. These are good improvements for readability and consistency.

I've added one suggestion to further improve the document by rephrasing a sentence to use active voice and adjusting its indentation, following the repository's documentation style guide.

[dveeden]

Looks like this regression was introduced in 54ff8a9 / #10904