fix: remove set width for repo pages charts

[zeucapua]

Description

Removes the windowWidth option on the CopyContainer for the Activity and Engagement charts on repo pages.

Related Tickets & Documents

Closes #4028

Mobile & Desktop Screenshots/Recordings

Mobile (smaller width)

Larger desktop view

Steps to QA

Tier (staff will fill in)

• [ ] Tier 1
• [ ] Tier 2
• [ ] Tier 3
• [x] Tier 4

[optional] What gif best describes this PR or how it makes you feel?

[netlify[bot]]

✅ Deploy Preview for design-insights ready!

Name	Link
🔨 Latest commit	e9cc3f6ba758830694bbd54558250eb4dcc38a4e
🔍 Latest deploy log	https://app.netlify.com/sites/design-insights/deploys/66d0d199cf8bdb0008e66e12
😎 Deploy Preview	https://deploy-preview-4068--design-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.

[netlify[bot]]

✅ Deploy Preview for oss-insights ready!

Name	Link
🔨 Latest commit	e9cc3f6ba758830694bbd54558250eb4dcc38a4e
🔍 Latest deploy log	https://app.netlify.com/sites/oss-insights/deploys/66d0d19945cc230008f44cfb
😎 Deploy Preview	https://deploy-preview-4068--oss-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.