fix: bump hugo theme to 0.35.0

[Jcahilltorre]

Proposed changes

• Update hugo theme to 0.35.0
• Update code block highlight color choice. Fixes accessibility issues.

Checklist

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

• [ ] I have read the CONTRIBUTING doc
• [ ] I have added tests that prove my fix is effective or that my feature works
• [ ] I have checked that all unit tests pass after adding my changes
• [ ] I have updated the necessary documentation
• [ ] I have rebased my branch onto main
• [ ] I will make sure my PR is targeting the main branch and pulling from my branch from my own fork