Use up-to-date maven domain

[AB-xdev]

See also https://stackoverflow.com/a/36156652

Why:

Closes: #39136

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

repo1.maven.org → repo.maven.apache.org

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

Source	Review	Production	What Changed
packages/working-with-a-github-packages-registry/working-with-the-apache-maven-registry.md	fpt ghec ghes@ 3.17 3.16 3.15 3.14 3.13	fpt ghec ghes@ 3.17 3.16 3.15 3.14 3.13

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

🤖 This comment is automatically generated.

[Sharra-writes]

Thanks for opening a PR! This looks like a pretty simple update that doesn't break anything, so I'm going to go ahead and approve it and get it merged.

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