fix: resolve issue with pagination URLs

[greatislander]

• This pull request has been linted by running npm run lint without errors
• This pull request has been tested by running npm run start and reviewing affected routes
• This pull request has been built by running npm run build without errors
• This isn't a duplicate of an existing pull request

Description

This PR resolves an issue where the links generated by Eleventy's pagination plugin did not use the computed permalink from pages.11tydata.js. It also improves the accessibility of the pagination component.

Steps to test

1. Run npm start.

Expected behaviour: Pagination works as expected.

Additional information

See also: fluid-project/trivet#353

Related issues

Not applicable.

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