docs: Update pnpm supported versions

[Spice-Z]

Why:

pnpm v9 is supported from this PR. https://github.com/dependabot/dependabot-core/pull/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

Check off the following:

• [x] 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.

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

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Thanks for opening this pull request! A GitHub docs team member should be by to give feedback soon. In the meantime, please check out the contributing guidelines.

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This comment is automatically generated and will be overwritten every time changes are committed to this branch.

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
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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