[WIP] Fix accessibility issue with link distinguishability

[Copilot]

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Original prompt

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This section details on the original issue you should resolve

<issue_title>Accessibility issue: Links must be distinguishable without relying on color on /</issue_title>
<issue_description>## What
An accessibility scan flagged the element <a href="https://stateofopencon.com/">State of Open Con 25</a> on https://ox.ca because links must be distinguishable without relying on color. Learn more about why this was flagged by visiting https://dequeuniversity.com/rules/axe/4.11/link-in-text-block?application=playwright.

To fix this, ensure links are distinguished from surrounding text in a way that does not rely on color.

Specifically:

Fix any of the following:

• The link has insufficient color contrast of 1.27:1 with the surrounding text. (Minimum contrast is 3:1, link text: #267cb9, surrounding text: mgifford/ox.ca#666666)
• The link has no styling (such as underline) to distinguish it from the surrounding text

Acceptance Criteria

• The specific axe violation reported in this issue is no longer reproducible.
• The fix MUST meet WCAG 2.1 guidelines OR the accessibility standards specified by the repository or organization.
• A test SHOULD be added to ensure this specific axe violation does not regress.
• This PR MUST NOT introduce any new accessibility issues or regressions.

</issue_description>

Comments on the Issue (you are @copilot in this section)

• Fixes Accessibility issue: Links must be distinguishable without relying on color on / #7

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