Adjust horizontal spacing for content to improve readability

[lamATnginx]

Proposed changes

Improve readability on smaller laptops (e.g. MB13' and MB14') by distancing the content from the sidebar more.

Before (on MBP 13'):

After (on MBP 13'):

Before (on 24' Monitor):

After (on 24' Monitor):

Checklist

Before creating a PR, run through this checklist and mark each as complete.

• I have read the CONTRIBUTING document
• If applicable, I have added tests that prove my fix is effective or that my feature works
• If applicable, I have checked that any relevant tests pass after adding my changes
• I have updated any relevant documentation (README.md and CHANGELOG.md)

[github-actions]

✅ Deploy Preview will be available once build job completes!

Name	Link
😎 Deploy Preview	https://frontdoor-test-docs.nginx.com/previews/nginx-hugo-theme/431/

---

[nginx-jack]

Looks nicer to me at a glance 👍