[DESIGN]: board members page needs a revamp

### Describe the Issue

The board members page needs a revamp. We can get this done once the #5253
is merged.

### Expected Outcome

Consistent design matching the theme of the website

### Screenshots

### Steps to Reproduce

Board Members page under community section.

### Browser/Device

NA

### Additional Notes

_No response_

### Check Before Submitting

- [x] I have looked for similar issues to avoid duplicates.
- [x] I have reviewed the [Contributing Guidelines](https://github.com/asyncapi/.github/blob/master/CONTRIBUTING.md).

### Would you like to help fix this issue? (Not required, but appreciated!)

- [x] Yes, I am interested in contributing to the fix.
- [x] No, I am just reporting the issue.