Bold active nav links for accessibility (#5673)
Before
<img width="412" alt="Screenshot 2024-07-31 at 3 47 38 PM"
src="https://github.com/user-attachments/assets/d95ebb62-079b-4e20-964c-9876b5978e4c">
After
<img width="412" alt="Screenshot 2024-07-31 at 3 47 21 PM"
src="https://github.com/user-attachments/assets/a658d46a-3eeb-4f00-8952-d4c1dd91afe6">
