[polaris.shopify.com] Missing a `/` in the link to edit docs page

[kassiwin]

Issue summary

The Edit this page link at the bottom of the documentation page leads to a 404. Noticed that there is a missing /in the URL.

Expected behavior

Actual behavior

Steps to reproduce the problem

1. Go to https://polaris.shopify.com/components/lists/option-list for instance.
2. Scroll to the bottom of the page and click on Edit this page

[github-actions]

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[SMAKSS]

This is an unexpected occurrence, but we are once again witnessing the presence of a missing / in the path. We inadvertently overrode the editPageLinkPath instances while attempting to resolve a build-related issue. However, we neglected to rectify the actual editPageLinkPath instances.

@alex-page @kyledurand

[SMAKSS]

Implemented a fix on #13982.