Fix kubeweekly section bug

[killjoycircuit]

Description
Fixes dark mode text visibility issue in the KubeWeekly newsletter signup section on the homepage. The text was displaying in black on the dark background making it unreadable for users browsing with dark mode enabled.

Changes:
Added dark mode styles for .section-feature#kubeweekly

Issue
Closes: #53121

[linux-foundation-easycla]

The committers listed above are authorized under a signed CLA.

• ✅ login: killjoycircuit / name: Rutuj Dhawale (4b07745)

[k8s-ci-robot]

Welcome @killjoycircuit!

It looks like this is your first PR to kubernetes/website 🎉. Please refer to our pull request process documentation to help your PR have a smooth ride to approval.

You will be prompted by a bot to use commands during the review process. Do not be afraid to follow the prompts! It is okay to experiment. Here is the bot commands documentation.

You can also check if kubernetes/website has its own contribution guidelines.

You may want to refer to our testing guide if you run into trouble with your tests not passing.

If you are having difficulty getting your pull request seen, please follow the recommended escalation practices. Also, for tips and tricks in the contribution process you may want to read the Kubernetes contributor cheat sheet. We want to make sure your contribution gets all the attention it needs!

Thank you, and welcome to Kubernetes. 😃

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is NOT APPROVED

This pull-request has been approved by:
Once this PR has been reviewed and has the lgtm label, please assign lmktfy for approval. For more information see the Code Review Process.

The full list of commands accepted by this bot can be found here.

Needs approval from an approver in each of these files:

• OWNERS

Approvers can indicate their approval by writing /approve in a comment
Approvers can cancel approval by writing /approve cancel in a comment

[netlify]

✅ Pull request preview available for checking

Built without sensitive environment variables

Name	Link
🔨 Latest commit	4b07745
🔍 Latest deploy log	https://app.netlify.com/projects/kubernetes-io-main-staging/deploys/690f806508b035000890932c
😎 Deploy Preview	https://deploy-preview-53122--kubernetes-io-main-staging.netlify.app
📱 Preview on mobile	Toggle QR Code... Use your smartphone camera to open QR code link.

---

To edit notification comments on pull requests, go to your Netlify project configuration.

[Caesarsage]

Thanks for your first contribution and welcome to the community, @killjoycircuit!

I noticed that your changes also affected the “View past newsletters” anchor link — it’s now white instead of its original color, which made it easier to identify as a link. Could you please revert that change?

Your changes:

Expected from the issue

[lmktfy]

It's OK to fix this, but please also consider merging #51829 instead.