Use "em dash" instead of "hyphens" to set off end clause

[hsnabszhdn]

Why:

Using "hyphens" is against the style guide.

GitHub refers to Microsoft's Style Guide for punctuation and Microsoft suggests:

Use one em dash to set off a phrase or clause at the end of a sentence.

Closes: N/A

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

-- changes to — at the end of the sentence.

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• I have reviewed my changes in staging, available via the View deployment link in this PR's timeline (this link will be available after opening the PR).

  • For content changes, you will also see an automatically generated comment with links directly to pages you've modified. The comment won't appear if your PR only edits files in the data directory.

• For content changes, I have completed the self-review checklist.

[github-actions]

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The table contains an overview of files in the content directory that have been changed in this pull request. It's provided to make it easy to review your changes on the staging site. Please note that changes to the data directory will not show up in this table.

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Content directory changes

You may find it useful to copy this table into the pull request summary. There you can edit it to share links to important articles or changes and to give a high-level overview of how the changes in your pull request support the overall goals of the pull request.

Source	Preview	Production	What Changed
pull-requests/committing-changes-to-your-project/creating-and-editing-commits/changing-a-commit-message.md	fpt ghec ghes@ 3.12 3.11 3.10 3.9 3.8	fpt ghec ghes@ 3.12 3.11 3.10 3.9 3.8

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

[nguyenalex836]

@itecompro Thanks so much for opening a PR with this fix! I'll update the branch and get this merged once tests are passing 🍏

[github-actions]

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