docs: Update pnpm supported versions

[Spice-Z]

Why:

pnpm v9 is supported from this PR.
dependabot/dependabot-core#9668

But the document doesn't include v9, so I added it.

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

Before	After

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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
code-security/dependabot/dependabot-version-updates/about-dependabot-version-updates.md	fpt ghec ghes@ 3.13 3.12 3.11 3.10 3.9	fpt ghec ghes@ 3.13 3.12 3.11 3.10 3.9	from reusable
code-security/dependabot/dependabot-version-updates/configuration-options-for-the-dependabot.yml-file.md	fpt ghec ghes@ 3.13 3.12 3.11 3.10 3.9	fpt ghec ghes@ 3.13 3.12 3.11 3.10 3.9	from reusable

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

[nguyenalex836]

@Spice-Z Thanks so much for opening a PR with this fix! ✨

GitHub Docs is currently in a repo freeze, but as soon as the freeze ends on July 8th, I'll update the branch and get this merged 🍏

[Spice-Z]

@nguyenalex836

Thank you for reviewing, I got it!
Have a good time!

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