Applied dark mode to project cards

[dw2761]

Please, go through these steps before you submit a PR.

• [x] My Pod Leader knows I'm working on this Pull Request
• [x] I've explained what the Pull Request is adding.
• [x] I've explained why this is important.

1. dark mode for project cards

2. light mode for project cards

[netlify[bot]]

✅ Deploy Preview for prep-22-jul-prep-3-portfolio ready!

Name	Link
🔨 Latest commit	88e70e17973d8c927061142606ef810a3b3c3254
🔍 Latest deploy log	https://app.netlify.com/sites/prep-22-jul-prep-3-portfolio/deploys/62d18de52c1f7200088a2886
😎 Deploy Preview	https://deploy-preview-48--prep-22-jul-prep-3-portfolio.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 site settings.