Update macos-26-intel runner links

[muzimuzhi]

Why:

Closes: #43198

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

The link bound to macos-26-intel runner label.

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/reference/runners/github-hosted-runners.md	fpt ghec ghes@ 3.20 3.19 3.18 3.17 3.16 3.15 3.14	fpt ghec ghes@ 3.20 3.19 3.18 3.17 3.16 3.15 3.14	from reusable

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[Copilot]

Pull request overview

Updates the docs reusable that lists supported GitHub-hosted runner labels so the macos-26-intel label links to the correct runner-images README, resolving the broken link reported in #43198.

Changes:

• Fix the macos-26-intel hyperlink target in the public-repo runners table.
• Fix the macos-26-intel hyperlink target in the private/internal-repo runners table.

[Sharra-writes]

@muzimuzhi Thanks for the fix!

[github-actions]

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[tchadcool9-ctrl]

e165ddc- [ ] 750c99