Add angle brackets to email address in on-behalf-of CLI instructions

[hacker1024]

Why:

Closes: #34497

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

Angle brackets have been added around the email address in the on-behalf-of CLI instructions, and the capitalization has been made consistent with the rest of the page.

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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.

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[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

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Source	Preview	Production	What Changed
pull-requests/committing-changes-to-your-project/creating-and-editing-commits/creating-a-commit-on-behalf-of-an-organization.md	fpt ghec	fpt ghec

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

[nguyenalex836]

@hacker1024 Thank you for raising a PR and flagging this! ✨ Our style guide states the following regarding placeholder text:

Style any placeholder text in all caps. If a placeholder is multiple words, connect the words with dashes (kebab-case). If you use a placeholder, explain what someone might replace it with. This helps people modify examples to fit their needs and helps identify placeholders for people who use assistive technology.

Use:

• In the following example, replace YOUR-REPOSITORY with the name of your repository. git init YOUR-REPOSITORY
• Click Add USERNAME. Where USERNAME is the username of the person you want to add.

Avoid:

• git init your repository
• git init <your-repository>
• Click Add username.

Would you be willing to update your PR to align the doc with the style guide? 💛

[github-actions]

This PR has been automatically closed because there has been no response to to our request for more information from the original author. Please reach out if you have the information we requested, or open a new issue to describing your changes. Then we can begin the review process.