Fix inverted link color

[mtruj013]

Done

• Fixed broken link colors on the meganav

QA

• View the site locally in your web browser at: http://0.0.0.0:8002/data
• Click on "All canonical"
• See that link color looks correct

Issue / Card

Fixes https://warthogs.atlassian.net/browse/WD-9655

Screenshots

[webteam-app]

Demo starting at https://canonical-com-1214.demos.haus

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 71.45%. Comparing base (49c790a) to head (0d86269). Report is 3 commits behind head on main.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #1214 +/- ## ======================================= Coverage 71.45% 71.45% ======================================= Files 12 12 Lines 1023 1023 ======================================= Hits 731 731 Misses 292 292 ``` | [Flag](https://app.codecov.io/gh/canonical/canonical.com/pull/1214/flags?src=pr&el=flags&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=canonical) | Coverage Δ | | |---|---|---| | [python](https://app.codecov.io/gh/canonical/canonical.com/pull/1214/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=canonical) | `71.45% <ø> (ø)` | | Flags with carried forward coverage won't be shown. [Click here](https://docs.codecov.io/docs/carryforward-flags?utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=canonical#carryforward-flags-in-the-pull-request-comment) to find out more.

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[bartaz]

Should be fixed in global nav by properly triggering dark theme on dropdown: https://github.com/canonical/global-nav/pull/282

[mtruj013]

Fixes applied in https://github.com/canonical/global-nav/pull/282, https://github.com/canonical/canonical.com/pull/1217/