Fix character entity references

[koyuki7w]

Why:

Closes: gh-36890

What's being changed (if available, include any code snippets, screenshots, or gifs):

Appended missing semicolons to the character entity references.

Check off the following:

• A subject matter expert (SME) has reviewed the technical accuracy of the content in this PR. In most cases, the author can be the SME. Open source contributions may require an SME review from GitHub staff.
• The changes in this PR meet the docs fundamentals that are required for all content.
• All CI checks are passing and the changes look good in the review environment.

[github-actions]

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The table shows the files in the content directory that were changed in this pull request. This helps you review your changes on the review server. Changes to the data directory are not included in this table.

Source	Review	Production	What Changed
contributing/setting-up-your-environment-to-work-on-github-docs/troubleshooting-your-environment.md	fpt ghec ghes@ 3.16 3.15 3.14 3.13 3.12	fpt ghec ghes@ 3.16 3.15 3.14 3.13 3.12

Key: fpt: Free, Pro, Team; ghec: GitHub Enterprise Cloud; ghes: GitHub Enterprise Server

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[subatoi]

Hi @koyuki7w, thank you for raising a pull request and linking it to your issue. We'll review this as soon as we can

[subatoi]

Thanks for spotting and fixing this, @koyuki7w — we'll get this merged soon

Thanks for your interest in the GitHub docs! ✨

[github-actions]

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