Update link for renewing GitHub Education account

[Joseph-Edwards]

Why:

Closes: #36625

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

This PR updates the link for renewing a GitHub Education to avoid incorrectly redirecting to https://github.com/education. Instead, the user will always end up at the desired https://education.github.com/learner/learn.

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.

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

Source	Review	Production	What Changed
education/explore-the-benefits-of-teaching-and-learning-with-github-education/github-education-for-students/apply-to-github-education-as-a-student.md	fpt	fpt

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

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[subatoi]

Closing (at least for now) as agreed in #36625

Edit: now reopened, also as agreed in 36625

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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 describe your changes. Then we can begin the review process.

[subatoi]

Many thanks for persevering with this, @Joseph-Edwards! We really appreciate it. I'm going to apply a couple of minor edits that are purely style-based, then I'll get this merged for you

[subatoi]

Thank you again!

[github-actions]

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