fix(build): put optimizer in pr.new builds

[wmertens]

without this, it was using a copy of the previous release

[netlify[bot]]

✅ Deploy Preview for qwik-insights ready!

Name	Link
🔨 Latest commit	7f48a528324a2531f9d236a96ac3ae329d1e9bd6
🔍 Latest deploy log	https://app.netlify.com/sites/qwik-insights/deploys/6675ee716fa1e000089b602e
😎 Deploy Preview	https://deploy-preview-6589--qwik-insights.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 configuration.

[cloudflare-pages[bot]]

Deploying qwik-docs with    Cloudflare Pages

Latest commit:	7f48a52
Status:	✅  Deploy successful!
Preview URL:	https://31785b9e.qwik-8nx.pages.dev
Branch Preview URL:	https://fix-pr-new.qwik-8nx.pages.dev

View logs