Update the PHP version matrix for PHP tests to include php8.2 version instead of 8.0.

[eugene-manuilov]

Summary

Addresses issue:

• #7964

Relevant technical choices

PR Author Checklist

• [ ] My code is tested and passes existing unit tests.
• [ ] My code has an appropriate set of unit tests which all pass.
• [ ] My code is backward-compatible with WordPress 5.2 and PHP 5.6.
• [ ] My code follows the WordPress coding standards.
• [ ] My code has proper inline documentation.
• [ ] I have added a QA Brief on the issue linked above.
• [x] I have signed the Contributor License Agreement (see https://cla.developers.google.com/).

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Code Reviewer Checklist

• [ ] Run the code.
• [ ] Ensure the acceptance criteria are satisfied.
• [ ] Reassess the implementation with the IB.
• [ ] Ensure no unrelated changes are included.
• [ ] Ensure CI checks pass.
• [ ] Check Storybook where applicable.
• [ ] Ensure there is a QA Brief.

Merge Reviewer Checklist

• [ ] Ensure the PR has the correct target branch.
• [ ] Double-check that the PR is okay to be merged.
• [ ] Ensure the corresponding issue has a ZenHub release assigned.
• [ ] Add a changelog message to the issue.

[github-actions[bot]]

Build files for 29ddceaf20464bea7e5de859e873989074acc3ee are ready:

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[archon810]

8.2 has compatibility issues https://github.com/google/site-kit-wp/issues/8331.