[api-documenter] Missing empty line after emitted HTML tags for tables

[catloversg]

Summary

In #4578, we emit HTML tags for tables instead of Markdown code, but the emitted tags make some Markdown code rendered incorrectly in some cases.

Repro steps

• Clone https://github.com/catloversg/api-documenter-bug-pr-4578.
• Run npm run doc.
• Check markdown\library.library.testfunction.md.

Expected result: There is a empty line between </tbody></table> and **Returns:**.

Actual result: No empty line between </tbody></table> and **Returns:**.

Details

This bug was caused by #4578.

Standard questions

Please answer these questions to help us investigate your issue more quickly:

Question	Answer
@microsoft/api-documenter version?	7.25.10
Operating system?	Windows
Documentation target?	Markdown
Would you consider contributing a PR?	No
TypeScript compiler version?	5.4.2
Node.js version (node -v)?	20.11.1