actions: remove retired macos-13 runners

[sarisia]

Why:

macos-13 runners are already retired and seems not runnable anymore.

On Actions I got this:

related: actions/runner-images#13046

Closes:

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

• removed macos-13 related runners from github-hosted runners and larger runners pages
• updated larger runners how-tos where uses macos-13-xlarge runner

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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Table of review links

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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 a staging server. Changes to the data directory are not included in this table.

Source	Review	Production	What Changed
actions/how-tos/manage-runners/larger-runners/use-larger-runners.md	fpt ghec	fpt ghec
actions/reference/runners/larger-runners.md	fpt ghec ghes@ 3.19 3.18 3.17 3.16 3.15 3.14	fpt ghec ghes@ 3.19 3.18 3.17 3.16 3.15 3.14	from reusable
actions/reference/runners/github-hosted-runners.md	fpt ghec ghes@ 3.19 3.18 3.17 3.16 3.15 3.14	fpt ghec ghes@ 3.19 3.18 3.17 3.16 3.15 3.14	from reusable

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

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[Copilot]

Pull request overview

This PR removes all references to retired macOS-13 runners from the GitHub Actions documentation, as these runners are no longer available per the GitHub Actions runner-images retirement notice.

Key changes:

• Removed macos-13 from the standard GitHub-hosted runners documentation for both public and private repositories
• Removed macos-13-large and macos-13-xlarge from the larger runners table
• Updated the example workflow to use macos-15-xlarge instead of the retired macos-13-xlarge

Reviewed changes

Copilot reviewed 3 out of 3 changed files in this pull request and generated no comments.

File	Description
data/reusables/actions/supported-github-runners.md	Removed retired macos-13 runner label from Intel macOS runner entries in both public and private repository tables
data/reusables/actions/larger-runners-table.md	Removed retired macos-13-large and macos-13-xlarge runner labels from the larger runners table
content/actions/how-tos/manage-runners/larger-runners/use-larger-runners.md	Updated example workflow to use macos-15-xlarge instead of retired macos-13-xlarge

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[Sharra-writes]

@sarisia Thanks for opening a PR! I will confirm this change with the Actions team.